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Finned copper tube gas boilers & water heaters – Boiler Manual
18
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When applicable, provisions for vent, bleed and gas relief lines must
be made in accordance with the latest revision of ANSI Z223.1/
NFPA 54.
Safe lighting and other performance criteria were met with the gas
manifold and control assembly provided on the boiler. All gas
connections MUST be leak tested before putt ing the boiler into
operation.
Never use an open fl ame to test for gas leaks. Always
use an approved leak detection method. Failure to
comply with this warning can cause extensive property
damage, severe personal injury or death!
Whenever the gas supply piping is pressure tested the boiler/water
heater gas controls must be protected. If the test pressure is equal
to, or less than
1/2 psig
,
3.5 kPa
isolate the boiler/water heater
by closing it’s manual shut off valve, see Figure 10. If the test pressure
is greater than, or equal to
1/2 psig
,
3.5 kPa
, disconnect the boiler/
water heater and its individual shut-off valve.
Required Gas Pressure
Provide gas supply pressure at inlet to boiler gas train as follows:
LP
Nat
Minimum (in WC)
12
5
Maximum (in WC)
14
14
Measure pressure when boiler is fi ring at full rate. Low gas pressure
could indicate undersized gas line or insuffi cient gas supply.
"Static and operating gas pressure required at the gas valve inlet is
between
5 in
WC and
14 in
WC for natural gas and
12 in
WC
and
14 in
WC for propane. If the gas pressure is above this limit,
a lock-up style regulator suitable for dead end service such as an
Equimeter or Fisher must be installed to prevent increase (creep)
of gas pressure when the units are not operating. Th is pressure
regulator (supplied by others) may be installed at the service entrance
to each unit or a "master" regulator sized to handle multiple units
may be utilized. Consult local gas utility or regulator manufacturer
for recommendations to meet specifi c job site requirements."
ELECTRICAL WIRING
Electrical Power Connections
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation! Verify proper operation aft er
servicing!
ATT
ENTION. Au moment de l’entretien des
commandes, étiquetez tous les fi ls avant de les
débrancher. Des erreurs de câblage peuvent entraîner
un fonctionnement inadéquat et dangereux. S’assurer
que l’appareil fonctionne adéquatement une fois
l’entretirn terminé.
Th e electrical connections to this boiler/water heater must be made
in accordance with all applicable local codes and the latest revision
of the National Electrical Code, ANSI/NFPA-70. Installation should
also conform with CSA C22.1 Canadian Electrical Code Part I if
installed in Canada.
Install a separate 120 volt 15 amp circuit for the boiler/water heater
and circulator pump. A shut-off switch should be located at the
boiler/water heater. Th e boiler/water heater must be grounded in
accordance with the authority having jurisdiction, or if none, the
latest revision of the National Electrical Code, ANSI/NFPA-70.
Line voltage fi eld wiring of any controls or other devices must
conform to the temperature limitation of type T wire at
95°F
,
35°C
above room temperature. Use copper conductors with a minimum
size of #14 awg.
Refer to the wiring diagram supplied with the boiler/water heater
for proper wiring connections.
