Honeywell S89C Manual page 11

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POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
MAKE SURE L1 AND L2 ARE NOT REVERSED;
THIS WOULD PREVENT FLAME DETECTION.
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ECO SWITCH SHUTS DOWN SYSTEM IF TANK
TEMPERATURE EXCEEDS 210" F [99 C[
A CONTROLS IN 24V CIRCUIT MUST NOT BE IN
GROUND LEG TO TRANSFORMER.
FIG. 10—S89C,G,J AND S890C,G,J IN A COMMERCIAL WATER HEATING SYSTEM.
CHECKOUT
Check out the control system:
• At initial installation of the appliance.
• As part of regular maintenance procedures. Mainte­
nance intervals are determined by the application.
See PLANNING THE INSTALLATION, page 4, for
more information.
• As the first step in troubleshooting.
• Any time work is done on the system.
WARNING
FIRE OR EXPLOSION HAZARD.
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY OR DEATH.
1. If you smell gas or suspect a gas leak, turn off
gas at manual service valve and evacuate the
house. Do not try to light any appliance, do
not touch any electrical switch or telephone
in the building until you are sure no spilled
gas remains.
2. Gas leak test must be done as described in
Steps 1 and 5 below on initial installation and
any time work is done involving the gas pip­
ing.
STEP 1: Perform Visual Inspection.
□ With power off, make sure all wiring connections are
clean and tight.
□ Turn on power to appliance and ignition module.
□ Open manual shutoff valves in the gas line to the
appliance.
□ Do gas leak test upstream of gas control if piping has
been disturbed.
DUAL VALVE
COMBINATION
S89C,G,J/S890C.G,J HOT
GAS CONTROL
SURFACE IGNITION CONTROL
ECO N CONTROLLER
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FOR MODULE WITH TH-W TERMINAL AND VENT DAMPER PLUG,
JUMPER TH-W AND 24V TERMINALS. DO NOT REMOVE VENT
DAMPER PLUG.
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FACTORY TEST TERMINAL. DO NOT USE.
LEADWIRE MODEL IS COLOR-CODED AS SHOWN.
GAS LEAK TEST: Paint pipe joints with rich soap and
water solution. Bubbles indicate gas leak. Tighten joints
to stop leak.
STEP 2: Review Normal Operating Sequence (Fig. 12)
and Module Specifications.
□ See OPERATION, page 12, and SPECIFICATIONS,
page 2.
STEP 3: Reset the Module.
□ Turn the thermostat to its lowest setting.
□ Wait one minute.
As you do Steps 4 and 5, watch for points where
operation deviates from normal. Refer to Troubleshooting
Chart (Fig. 13) to correct problem.
STEP 4: Check Safety Lockout Operation.
□ Turn gas supply off.
□ Set thermostat or controller above room temperature to
call for heat.
□ Watch for igniter warmup either immediately or follow­
ing prepurge. See SPECIFICATIONS, page 2.
□ Time the length of time gas control stays open. The time
should not exceed the following:
4 sec. model—5.5 sec.
6 sec. model—7.5 sec.
11 sec. model— 15.0 sec.
15 sec. model—22.0 sec.
□ Three try for ignition modules only (S89G,H;S890G,H):
Watch for start of 30 sec. min. purge, followed by 34 sec.
nom. igniter warmup and second try for ignition. After a
third purge, warmup and trial for ignition sequence, these
modules lock out.
□ Open manual gas control knob and make sure no gas
is flowing to burner.
11
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(HOT)
L2
M2197
68 0070—1
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