April 23, 1999
Page 12
7)
Purge all the air from the gas lines. Check all connections for leaks and fix any leakage.
Ensure that the inlet pressure agrees with the name plate.
8)
Inspect all electrical wiring, both field and factory installed, for loose connections.
9)
Turn unit disconnect switch
A
ON
@
(control switch is still off) and check the supply voltage.
Voltage must be within 10% of name plate rating. If not, consult the power company and
have the voltage condition corrected before continuing unit start-up.
10)
Check setting of fan - limit control(s). Adjust high limit to value indicated below unless
wiring diagram shows a different value.
High Limit 180
E
F (82
E
C)
Fan Switch
A
ON
@
, 125
E
F (52
E
C)
Fan Switch
A
OFF
@
, 90
E
F (32
E
C)
Set all temperature controls to the temperature setting indicated on the wiring diagram.
11)
Set thermostat or controller in the
A
off
@
position and turn unit control switch
A
on
@
.
12)
Check all fan motors for correct rotation. If incorrect, reverse rotation.
13)
Check the amperage draw of each motor. Refer to name plate for full load amps.
14)
Re-check voltage at unit disconnect switch with unit running. If the power is not within 10%
of name plate, shut unit down and consult power company. Voltage should be within 2% on
all phase to phase readings when compared to each other. A 2% voltage difference could
cause as much as a 10% current imbalance.
OPERATION
CALL A QUALIFIED SERVICEMAN FOR SERVICE
OPERATIONAL CHECK
1. PILOT ADJUSTMENT
a) FOR UNITS WITH INTERMITTENT PILOT IGNITION:
Turn the burners on the following the above operating instructions and check to see if the
pilot flame is stable and blue in colour. The pilot should be large enough to completely
envelope the flame sensor. Adjust the pilot, if necessary, by turning the pilot adjustment
screw on the gas valve.
b) FOR ALL UNITS WITH DIRECT SPARK IGNITION:
Turn the burners on following the above operating instructions and check to make sure the
ignition is smooth with no delays. The spark igniter gap must be no less than 1/8" nor no
more than 3/16". Make sure the end of the flame sensor on the right burner head is in the
main burner flame approximately 1/2". Turn the unit off,
allow to cool and adjust if necessary.
2. BTU INPUT: All natural gas units are equipped with a Honeywell VR8200 or equivalent
valve. The outlet pressure is factory set to 3.5" WC, (0.87Kpa). Should adjustment be
required, the outlet pressure of the valve can be varied according to the following procedure.
Refer also to valve manufacturer's instructions for additional details. This procedure applies
only to natural gas fired units. Install and adjust units in accordance with local or provincial
gas codes.
(1) Turn knob on gas valve to "pilot" or "off".
