Finned copper tube gas boilers & water heaters – Boiler Manual
Finned copper tube gas boilers & water heaters – Boiler Manual
21
F
Always use a wrench on the gas valve body when
making gas connections to it. Never over-tighten the
piping entering the gas valve body or gas valve failure
may result!
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. Th e main Dungs gas valve supplied with boiler/water
heater does not require external venting.
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 14. 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.
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.
Au moment de l’entretien des commandes, étiquetez
tous les fils 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.
A properly rated 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 TEW wire at
95°F
,
35°C
above room temperature. Use copper conductors with a
minimum size of #14 awg. Use appropriate wiring materials for
units installed outdoors. Th e wire size must be compatible with
the total amp draw of the circuit.
Refer to the wiring diagram supplied with the boiler/water heater
for proper wiring connections and boiler full load amperage (FLA).
GENERAL OPERATION
Before proceeding read and fully understand the
instructions contained in this manual. Do not att empt
to operate this boiler/water heater if it has not been
installed in accordance with the guidelines set forth in
this manual. Failure to comply with this warning can
result in extensive property damage, severe personal
injury or death!
Should overheating occur or the gas supply fail to shut off , turn
off the manual gas control valve to the appliance.
Do not interrupt
water fl ow through the boiler/water heater.
En cas de surchauff e ou si l’alimentation en gaz ne s’arrête pas, fermez
manuellement le robinet d’arrêt de l’admission de gaz.
Hydronic Heating Boilers (Fill System)
Open the make-up water valve and slowly fi ll the boiler and all of the
radiation with water. Ensure that all bleed and drain valves are closed.
Adjust the make-up water pressure regulator so a minimum
5 psig
,
34.4 kPa
system pressure is maintained at the highest point in the
system piping. If a make-up water pump is used adjust it to maintain
a minimum
12 psig
,
82.7 kPa
pressure at boiler under operating
conditions.
Glycol systems require a minimum of
20 psig
,
137.8 kPa
at boiler operating conditions.
Open the boiler piping bleed valves one at a time, to purge
the air trapped in the primary and secondary heat
exchanger. Refer to piping drawings (Figures 10 & 11) for
bleed locations.
With the boiler off , run the system pump for at least 30 minutes
and bleed the system piping using the bleed valves. If strainers are
used in the system piping, the make- up water valve should be closed
and the strainers checked and cleaned.
Th e system expansion tank should be checked to ensure that the
correct water level in the tank is maintained. Th e tank should be
less than half full of water with the system full and adjusted
to the correct operating pressure.
Start the boiler as described in the “OPERA
TING INSTRUC-
TIONS” section. Run the boiler for at least an hour. Th e system
pump(s) and all radiation units must be operated during this time.
Ensure that the make-up water valve is open.
Shut the boiler off and open the bleed valves to purge the air trapped
in the heating system piping. Close the make-up water valve and
check and clean the strainers and make-up water pressure reducing
valve.
Open the make-up water valve and adjust the system pressure if
necessary. Th e system should be checked and bled aft er three days
of operation.
