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mr

.

steam

®

C U S E R I E S

Installation, Operating & Maintenance Manual

35

Steam Solenoid Valve 

1. 

Check voltage rating of solenoid valve (120 VAC 

for United States, Canada, Mexico; may be 220-
240 VAC for other countries). 

2. 

Check voltage across solenoid coil. 

a.If there is voltage across coil and valve does not 

allow passage of steam, check for clogged 
valve. Clean outline with bottle brush. If solenoid 
valve is still malfunctioning, the valve is defective 
and should be replaced. 

b.If there is no voltage across coil, check room 

tem-perature control. 

c.There will be a red dot under “OUT2” on the Digi-

tal 1 Control when there is a call for heat. 

d.Ensure, if equipped, the room Timer is On. 

 

Digital 1

®

 Control & Sensor:  

Consult Factory 

 

 

Heating Element 

  

Turn off all power at circuit breaker. 
Consult factory for resistance values.

 

1.

Check power voltage across heating element 
terminals. Refer to nameplate data for voltage 
rating. Voltage should be as marked on 
nameplate. 

2.

Using an ammeter, measure total current draw as 
per nameplate rating. (See also Amperage Chart, 
page 12. Each leg should register about the 
same current reading. 

3.

If there is more than one heating element, check 
amperes of each element. Each leg of the same 
element should register about the same reading 
for that element. Reading may be different from 
other elements due to KW (Kilowatt) rating of 
individual heating element. 

4.

Check heating element for resistance values. 
Consult factory for the resistance values for the 
element speci-fications. 

 

 Prior to checking boiler disconnect 

boiler from electric power supply at main safety 
switch or fuse panel. Turn boiler switch to OFF. 

CHECK 
PC Board - Models CU360-1400

 

 Prior to checking boiler disconnect boiler 

electric power supplies at main safety switch or fuse 
panel. Turn the boiler switch OFF. 

1. 

Turn the control voltage ON and turn the boiler 

switch ON. Measure the voltage across "L1" and 
"L2" on the 104460 board. The voltage should be 
approximately 110 VAC. 

2. 

On the 104460 board, disconnect the wire from the 

"LOW" terminal and check the voltage across "L2" 
and "PUMP". The voltage should be approximately 
110 volts (same as "L1" and "L2"). Connect a jumper 
between the "LOW" and "GND" terminals. The 
voltage between "L2" and "PUMP" should be zero. 

3. 

On the 104460 board, disconnect the wire from the 

"LOW" terminal. There should be no voltage between 
the "L2" and "CONT” terminals. Connect the jumper 
between the "LOW" and "GND" terminals. The 
voltage between "L2" and "CONT" should be 110V. 

 

Low Water Cutoff, Water Feed and 
High Water Cutoff Probes

 

Models CU360 through CU1400 are equipped with 
two probes for low water cutoff (LWCO) and water 
feed control. Models CU2000 through CU4500 are 
equipped with one probe for low water cutoff (LWCO). 
Failure to clean the probes may result in generator not 
operating, overflow or element failure. 
 

 Turn off all power supplies to steam 

bath generator and release pressure to zero (0 
psig) before removing probes. If model CU2000 
through CU4500, drain the tank. 

 

1. 

Probes are located in the top of the generator for 

models CU360 through CU1400. The probe is 
located on the back side of the generator for 
models CU2000 through CU4500. 

2. 

Remove probes using a standard spark plug 

wrench. Care should be taken not to damage the 
insulation.  

3. 

Check probes for deposits. Use emery cloth to 

clean probes. 

4. 

Remove and flush probe isolator (thoroughly) with 

water. If clogged, use a long piece of wire to 
remove obstruction. Replace if necessary, center 
probe rod in isolator tube. 

5.

Use teflon tape on probe threads and reinstall. 

6.

After installation, make sure probe is not touching 
ground. With generator drained and probe wires 
disconnected, there should be no resistance (X) 
between probe and ground. Check for leaks. 

7.

To test AUX LWCO, press and hold the manual 
reset button on the side of the steam bath generator 
for 5 seconds.

Summary of Contents for mr.steam CU Series

Page 1: ...tors Installation Operation Maintenance Manual Models CU360 through CU4500 Installation Operation Maintenance Manual _______________________________________ IMPORTANT LEAVE THIS MANUAL WITH THE OWNER...

Page 2: ...Mechanical Digital Blowdown Timers 28 29 30 Minute Room Timer 30 31 Trouble Shooting 32 34 Check PC Boards Probes Steam Solenoid Valve Digital 1 Control Heating Element 35 Element Replacement Instruct...

Page 3: ...closed with full walls door floor and ceiling 2 It is recommended that a gasketed door be used for heat sealing and steam containment Windows sky lights and the like that are part of the steam room sh...

Page 4: ...Steambath generator is provided with a WARNING sign This WARN ING is to be secured to the outside of the steam room on the steamroom door or adjacent to that door It s location must be such that all...

Page 5: ...n or the like 2 Do NOTinstall steambath generator outdoors or wherev er environmental conditions may effect the safety and or performance of the generator Do NOT install steambath generator in locatio...

Page 6: ...inches Shipping No KW Volume cu ft Size NPT Size NPT W L H Wt lbs CU360 9 400 1 4 1 20 30 38 230 CU500 12 500 1 4 1 20 30 38 230 CU750 18 750 1 4 1 20 30 38 230 CU1000 24 1000 1 4 1 20 30 38 230 CU12...

Page 7: ...ow 1 All dimensions are approximate 2 CU360 to CU1400 have electronic liquid level controls MM150 Liquid Level Control on CU2000 and larger models only 15 7 15 7 22 0 6 6 9 4 13 5 25 0 16 4 12 6 1 9 3...

Page 8: ...ly CU360 to CU1400 have electronic liquid level controls 2 Minimum Clear ance from Combustible Sur faces 1 above top of CU generator Front of CU generator suitable for alcove installation only Type of...

Page 9: ...rea Clearance 36 89 18 36 103 MM150 Service Area Clearance Service Area Clearance 24 180 Max 16 Access to service areas to be supplied by customer Access door must not be less than 30 wide x 78 high R...

Page 10: ...ce as required in accordance with Code 7 Provide unions as required to facilitate installa tion and disconnection of piping 8 Recheck all factory and field plumbing con nections for tightness WATER QU...

Page 11: ...am ooms us ac l c be lass o othe o heat es sta t mate als used o steam oom e closu e stall each steam head 2 ches abo e the loo ocate each steamhead a a om bathe seat a ea a d a a om t a c atte s as e...

Page 12: ...60 167 145 73 58 CU3000 72 200 174 87 70 CU4500 108 300 260 130 104 WIRING To avoid possible electric shock the steambath generator shall be suitably grounded in accordance with National Electric and...

Page 13: ...AGES 14 15 16 FOR DIAGRAMS Installer shall use a safety switch of ade quate capacity employing suitably rated circuit breakers or fuses between main electrical power source s and the generator Locatio...

Page 14: ...d room requires a Digital 1 and Solenoid Valve s CONTROL CIRCUIT WIRING DIAGRAM Digital 1 Temperature Control System and optional automatic blowdown assembly For Models CU360A to CU750A and CU1000AF3...

Page 15: ...00AB3 CU1000AC3 CU1250AB3 CU1250AC3 CU1400AB3 CU1400AC3 1 Larger rooms may require two or more steam solenoid valves in parallel 2 When generator services two rooms second room requires a Digital 1 an...

Page 16: ...the steam room at the location selected by the designer architect DO NOT LOCATE THE DIGITAL 1 and CU HTC SENSORS NEAR OR ABOVE THE STEAMHEAD S AS THIS MAY CAUSE DIRECT STEAM EMISSION TO INTERFERE WIT...

Page 17: ...lves and two steamheads CU2 D1 KIT CONSISTS OF Digital 1 Control factory installed on generator Digital 1 Sensor Two 3 4 Steam Solenoid Valves and 3 4 Steamhead Two Acrylic Shields one for each steamh...

Page 18: ...ided screws and nuts For one room installation use the upper blank 2 Connect the control wires to the bottom of the terminal block above the control The terminals are coded with the wire insulation co...

Page 19: ...will de energize to OFF When steam pressure reaches the operating pressure control setting the pres sure control will de energize the contactor s Operating pressure control is factory set at 5 psig I...

Page 20: ...d AM PM imprints for each day The time switch is set by push ing the captive trippers to the outer ring position for the entire period that the boiler is to be turned ON i e 2 hours to each tripper on...

Page 21: ...e closed Auto blowdown light should be OFF 3 Turn the override switch to permanent ON I On Off Switch pilot light and generator should be OFF Auto blowdown light should be ON Motorized drain valve rem...

Page 22: ...nst touch contact must be ensured by a proper mount ing When fitting the timer make sure that during normal operation it is impossible for the end user of the steam generator it was fitted in to remov...

Page 23: ...o be fully opened Main disconnect switch to be in ON position Generator switch to be in ON position Since generator will be empty water solenoid will be energized allowing the genera tor to fill with...

Page 24: ...switch to the OFF position and close water supply valve De energize wall mount ed safety switch Open blowdown valve s SLOWLY Pressure may still be in the generator 2 Discharge is complete when gauge g...

Page 25: ...INTENANCE INSTRUCTIONS To establish a good preventive maintenance program we suggest that the site equipment foreman engineer or owner operator familiarize themselves with these guidelines 1 Daily blo...

Page 26: ...d the glass outlet is pointing directly upward Verify top and bottom fit tings are threaded into the tapping the same number of turns distance A distance B 3 Remove glass packing nut friction washer d...

Page 27: ...to keep glass clean Use diluted acids such as Hydrochloric muriatic acid when regular cleaners do not seem to work Do not use wire brushes or any other abrasive materials which could scratch the glass...

Page 28: ...Due to the timer having one tripper for every 2 hours the boiler will need to be OFF a minimum 2 hours If less down time is needed the digital timer PN 103662 can be set to the minute SETTING TIME To...

Page 29: ...lay the boiler is currently running and if OFF is indicated the boiler is off blowing down Once one of the programs are started the indicator will automatically turn to the ON position and when one of...

Page 30: ...mercial Steambaths Electronic Interval Timer for MrSteam CU Commercial Steambaths Installation and Operating Manual 30 FUNCTIONALITY OF THE TIMESWITCH During the preset running time the timer energize...

Page 31: ...After the preset running time has elapsed the timer switches the connected steam solenoid off issuing short beeps for up to 15 seconds The value 0 00 is shown on the display and the colon stops flash...

Page 32: ...eating element Contactor chatters Defective PC board Check replace PC Board Generator floods Water feed solenoid Reverse solenoid connection installed backwards CU360 1400 Port 1 towards generator 2 t...

Page 33: ...Substitution of components or modification of wiring systems voids warranty and can lead to dangerous oper ating conditions Pulling off the purple wire from the board should cause the water solenoid...

Page 34: ...release pressure to zero 0 psig before resuming operation of steam bath generator STEP 8 Check to see that you have 120V at the contactor If you do not then one of your pressure controllers are trippe...

Page 35: ...e control voltage ON and turn the boiler switch ON Measure the voltage across L1 and L2 on the 104460 board The voltage should be approximately 110 VAC 2 On the 104460 board disconnect the wire from t...

Page 36: ...to a torque listed on the contactor ensure each nut holding the bus bars in place are torqued to 20 lb in Make sure all wires are clean and bright to assure good electrical contact 10 Open water valve...

Page 37: ...J Safety Valve K On Off Switch L Mechanical low water cutoff and feeder MM150 M Auxiliary low water cutoff probe LABEL FUNCTION CU360 1400 Typical Component Arrangement Front Right Side CU2000 4500 w...

Page 38: ..._______________________________________________________ ELECTRIC cont ________________________________________________________________________________ 99317 Fuse Block 480V ___________________________...

Page 39: ...____________ PRESSURE CONTROL _________________________________________________________ 99113R Operating Pressure Control 0 15 PSIG _________________________________________________________ 99290 Pres...

Page 40: ...A 90301 1 800 72 STEAM 2021 Mr Steam and des AirTempo AromaFlo AutoFlush AutoSteam AudioWizard Butler Package ChromaSteam Clean Steam Every Time Club Therapy Digital 1 Express Steam From Bathroom to S...

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