Ruskin ENERVENT+ EVT-09 Series, Installation, Start-Up And Maintenance Instructions

REVT-05ERV 37

Flue Passageway and Flue box

1.  Remove combustion air inducer as described in 

Steps 1-3

 above.

2. 

Remove flue box cover and clean with a wire brush 

as required.

3.  Clean tubes with wire brush.
4.  Follow 

Steps 5-6

 above.

F.  BLOWER COMPONENTS

Blower Access

 - The dual supply blower assembly in the 

EVT-10 and EVT-12 is designed to slide-out for servicing 

as shown in 

Figure 36

.

Lubrication

 - All motors are lubricated at the factory - no 

further lubrication is required.  Blower shaft bearings are 

pre-lubricated; however, for extended bearing life, re-

lubricate at least once every two years with a lithium base 

grease, such as Alvania 3 (Shell Oil), Chevron BRB@ 

(Standard Oil), or Regal AFB2 (Texas Oil).  
Use a hand grease gun for re-lubrication and add only 

enough grease to purge through the bearings so that a 

bead of grease appears at the seal lip contacts.

Under normal operating conditions, the combustion air 

inducer wheel should be checked and cleaned prior to 

the heating season.  However, it should be examined 

periodically during the heating season to establish an 

ideal cleaning schedule.  With power supply disconnected, 

the condition of the inducer wheel can be determined by 

removing the Flue Vent (

Figure 19

) and looking through 

the discharge opening.
Clean the combustion air inducer as follows:
1. 

Shut off power supply and gas to unit.

2.  Disconnect pressure switch air tubing from combustion 

air inducer port.

3. 

Remove  and  retain  screws  securing  flue  vent  to 

the inducer. Remove and retain screws securing 

combustion air inducer to the flue box.  

See Figure 

19.

4.  Clean inducer wheel blades with a small brush and 

wipe off any dust from housing.  Clean accumulated 

dust from front of flue box cover. 

At this point the flue passageway and flue box may be 

cleaned as described below.

5.  Reassemble the unit.  It is recommended that the 

combustion air inducer gasket be replaced during 

reassembly.

6.  Clean combustion air inlet louvers on heat access 

door using a small brush.

WARNING

The State of California has determined that this 

product may contain or produce a chemical or 

chemicals, in very low doses, which may cause 

serious illness or death. It may also cause cancer, 

birth defects, or reproductive harm.

FIGURE 36 - SLIDE-OUT BLOWER ASSEMBLY

BLOWER ACCESS DOOR

REMOVE SCREWS TO SLIDE 

BLOWER ASSEMBLY OUT 

OF UNIT

FLUE VENT COVER

DISENGAGE HANDLE BEFORE 

ATTEMPTING TO REMOVE 

STATIONARY PANEL

REMOVE STATIONARY PANEL BEFORE 

ATTEMPTING TO SLIDING BLOWER 

ASSEMBLY

BLOWER ASSEMBLY 

SLIDING BASE

For EVT-10 & EVT-12 Units Only: Blower assembly 

slides out to provide rear-blower service access.

Supply / Exhaust Blower Wheels

Fan Belts

 - Check on a regular basis for wear, tension, 

alignment, and dirt accumulation.  Premature or frequent 

belt failures can be caused by improper belt tension  or 

misaligned sheaves. Abnormally high belt tension or drive 

misalignment will cause excessive bearing loads and may 

result in failure of the fan and/or motor bearings.  Loose 

belts will cause squealing on start-up, excessive belt 

flutter,  slippage,  and  overheated  sheaves.    Both  loose 

and tight belts can cause fan vibration.  
When replacing belts on multiple groove drives, all belts 

must be changed in matched sets to provide uniform drive 

loading.  Do not pry belts on or off the sheave.  Loosen 

belt tension until belts can be removed by simply lifting 

off of the sheave.  Belt dressing should never be used.  

Never install new belts on worn sheaves.  If the sheaves 

have grooves worn in them, they must be replaced before 

new belts are installed.  Determine proper belt tension as 

shown in 

Figure 17

. 

Fan Motors

 - All motors use pre-lubricated, sealed 

bearings that require no further lubrication.  Motor 

maintenance is generally limited to inspection and 

cleaning.  Cleaning should be limited to exterior surfaces 

only.  Removing dust and grease buildup on motor 

housing aids motor cooling.  Never wash-down motor with 

high pressure spray.  

Fan Wheels

 - Require little attention when moving clean 

air.  Occasionally oil and dust may accumulate causing 

imbalance. When this occurs the wheel and housing 

should be cleaned to assure smooth and safe operation.  

Inspect fan wheel and housing for fatigue cracks, 

corrosion and wear.