System Start-up
RT-SVX35H-EN
77
2. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit's terminal
block 1TB1 or the unit mounted disconnect switch
1S14.
3. Turn the 115 volt control circuit switch 1S1 and the 24
volt control circuit switch 1S70 to the "On" position.
4. Open the Human Interface access door, located in the
unit control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate SAHF-PTG manual for CV or
VAV applications for the SERVICE TEST screens and
programming instructions.
5. Use
to program the Supply Fan for
operation by scrolling through the displays.
6. Once the configuration for the Fan is complete, press
the NEXT key until the LCD displays the “Start test in
__Sec.” screen. Press the + key to designate the delay
before the test is to start. This service test will begin
after the TEST START key is pressed and the delay
designated in this step has elapsed. Press the ENTER
key to confirm this choice.
7. Press the TEST START key to start the test. Remember
that the delay designated in the previous step must
elapse before the fans will begin to operate.
8. With the system in the SERVICE MODE and the supply
fan rotating in the proper direction, measure the
amperage at the supply fan contactor 1K16 & 1K15. If
the amperage exceeds the motor nameplate value, the
static pressure is less than design and the airflow is too
high. If the amperage is below the motor nameplate
value, static pressure may be too high and cfm may be
too low. To determine the actual cfm (± 5%);
a. Measure the actual fan rpm
b. Calculate the Theoretical bhp
i. Actual Motor Amps X Motor (hp)
Motor Nameplate Amps
c. Plot this data onto the appropriate Fan Performance
Curve in
. Where
the two points intersect, read straight down to the
cfm line.
Use this data to assist in calculating a new fan drive if the
cfm is not at design specifications.
An alternate method with less accuracy is to measure the
static pressure drop across the evaporator coil. This can be
accomplished by;
a. Drilling a small hole through the unit casing on each
side of the coil.
b. Measure the difference between the pressures at
both locations.
c. Plot this value onto the appropriate pressure drop
. Use the
data in
Table 22, p. 101
(Component Static Pressure
Drops) to assist in calculating a new fan drive if the
cfm is not at design specifications.
d. Plug the holes after the proper cfm has been
established.
9. Press the STOP key at the Human Interface Module in
the unit control panel to stop the fan operation.
Variable Air Volume Systems
1. Ensure that the "System" selection switch at the
remote panel is in the "Off" position.
2. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit's terminal
block 1TB1 or the unit mounted disconnect switch
1S14.
3. Turn the 115 volt control circuit switch 1S1 and the 24
volt control circuit switch 1S70 to the "On" position.
WARNING
Hazardous Voltage!
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1
OR UNIT DISCONNECT SWITCH 1S14. Disconnect all
electric power, including remote disconnects before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
Failure to disconnect power before servicing could
result in death or serious injury.
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury.
NOTICE:
Equipment Damage!
Coil damage can occur if care is not taken when drilling
holes in this area.
WARNING
Hazardous Voltage!
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK
1TB1 OR UNIT DISCONNECT SWITCH 1S14. Disconnect
all electric power, including remote disconnects before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
Failure to disconnect power before servicing could
result in death or serious injury.
Summary of Contents for IntelliPak WEHE Series
Page 15: ...General Information RT SVX35H EN 15 Figure 1 Unit component layout and ship with locations...
Page 17: ...Installation RT SVX35H EN 17 Figure 2 Typical control module location...
Page 44: ...Installation 44 RT SVX35H EN Figure 27 Typical field power wiring for W_HE casings 2 through 6...
Page 56: ...Installation 56 RT SVX35H EN Figure 32 Wiring notes for CV controls...
Page 60: ...Installation 60 RT SVX35H EN Figure 35 Wiring notes VAV...
Page 68: ...System Start up 68 RT SVX35H EN Figure 38 Typical fenwall ignition control system...
Page 69: ...System Start up RT SVX35H EN 69 Figure 39 Typical Fenwall ignition control system...
