ICP GWA 245, Руководство пользователя

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GWA Gas-Fired Water Boilers – Boiler Manual
9
Part Number 670 01 1001 00
Figure 4 Vent damper assemblies
Damper installation
Do not modify draft hood or vent damper, or make
another connection between draft hood and vent
damper or boiler except as noted below. This will void
CSA certification and will not be covered by
Williamson-Thermoflo warranty. Any changes will
cause severe personal injury, death or substantial
property damage.
1. Install vent damper horizontally or vertically as shown in vent
damper manufacturer’s instructions. Vent damper must be
installed so that it serves only one boiler and so damper blade
indicator is visible to the user. See Figure 4.
2. Screws or rivets used to secure the vent damper to the draft
hood must not interfere with rotation of the damper blade.
3. Install damper harness between damper actuator and hole in
jacket left side panel. See Figure 3, page 8.
Use strain relief connectors and locknuts to secure both ends
of damper harness.
Keep wiring harness clear of all hot surfaces. Wire
insulation could be damaged, causing risk of electrical
short-circuit.
4. Read and apply the harness plug warning label (shown upper-
left) so that it is visible after installation
5. Plug damper harness receptacle into damper harness plug.
Bypassing (jumpering) vent damper will cause flue
products such as carbon monoxide to escape into
the house. This will cause severe personal injury or
death.
After boiler has operated once, if either end of harness
is disconnected, the system safety shutdown will
occur. The boiler will not operate until harness is
reconnected.
Effikal damper — Damper hold open switch must be
in Automatic Operation position for system to operate
properly.
Vent damper
continued
2 Prepare boiler
continued
GWA Gas-Fired Water Boilers – Boiler Manual
28
Part Number 670 01 1001 00
Is 24VAC present across transformer terminals C & Y?
Is damper harness securely plugged in at both ends?
Secure connections.
Check for open thermostat, LWCO, high limit, spill switch or
rollout thermal fuse element contacts or check for loose
wire connections.
If LWCO, spill switch or rollout thermal fuse
element contacts are open, determine cause
and correct condition. Failure to do so will
cause severe personal injury, death or
substantial property damage.
Check/repair out of round stack section.
Does vent damper rotate open?
Is 24VAC present across transformer terminal C and yellow
wire on vent damper connector?
Is 24VAC present across gas valve terminals?
Open thermostat contacts for 30 seconds. Vent damper will
rotate to closed position. Close thermostat contacts. Vent
damper will rotate to open position.
Is 24VAC present across gas valve terminals?
Remove damper harness from
damper harness plug.
TEMPORARILY install jumper
between terminal 2 and
terminal 5 on damper plug in
boiler wiring harness. See
Table, right.
Does boiler fire?
No Yes
No Yes
Chart 1 —
Standing pilot
— Boiler will not fire
Check for loose wire connections or bad relay on
transformer.
No Yes
Is vent damper rotated open?
No Yes
No Yes
• Replace actuator.
• Retest.
Check continuity of each wire in damper harness. Does
continuity exist for each wire? See Table right.
• Replace damper
wiring harness.
• Retest.
• Replace gas valve.
• Retest.
Is main flame on now?
No Yes
Retest.
No Yes
No Yes
No Yes
No Yes
• Replace damper actuator.
• Retest.
• Turn gas valve cock to
ON position.
• Retest.
• Replace gas valve.
• Retest.
Is gas valve cock turned to ON position?
No Yes
Before proceeding, follow "Troubleshooting sequence" on page 27. If problem persists, then:
11 Troubleshooting
continued