GLOW T-150, Installation & Operation Manual

Page: 55 / 88

Glow T150 & T180
Tankless Condensing Water Heater
55
5.7 Gas Supply Connections
WARNING: Do not attempt to convert
this water heater for use with a different
type of gas other than the type shown on the
rating plate. Doing so could result in death,
personal injury, explosion or fire, product
damage and or poor operating conditions or
performance.
Δ All gas piping shall be in accordance with local
utility company requirements and /or in the
absence of local codes, use the latest edition of
National Fuel Gas Code (NFGC), ANSI Z223.1.
In Canada, use the latest edition of CSA B149.1,
National Gas and Propane installation code.
Δ Apply a thin coat of pipe compound to all the
threaded male ends. Compound must be of the
type resistant to the action of LP Gas.
Δ To ensure proper water heater operation, the
gas pipe and gas meter must be sized correctly.
Δ If flexible connectors are used, the minimum
inside diameter must be 3/4” or greater and the
rated capacity if the connector must be equal to
or greater than the BTU capacity of the water
heater.
Δ Do not use excessive force when tightening the
pipe sections. Excessive force can damage
the water heater, especially when Teflon pipe
compound is used.
Δ Switch on the electricity, water and gas supplies
and check for any gas leaks using a soapy
solution or leak detector spray.
Figure 5.8 - Electric fan
WASHER
BETWEEN HEAT
EXCHANGER
AND FAN
BLOWER
GAS VALVE
GAS VALVE
FITTING
VENTURI
GAS VALVE
RUBBER
COUPLING
BLOWER VENTURI
O-RING
Gas valve (see fig. 5.8)
Δ Use a 3 mm hex bit to remove the 4 bolts from
the 1/2” NPT gas flange, on the underside of the
unit. Careful not to damage the o-ring between
the flange and the gas valve.
Δ Remove the 2 torx screws (T25) that secure the
gas valve to the venturi.
Δ Pull down on the gas valve to separate it from
the venture. Careful not to damage or lose the
rubber coupling
Δ Replace the gas valve and re-assemble the
components following the above procedure in
reverse order.
Δ Check for gas leaks.
Electric fan (see fig. 5.8)
Δ Remove and dismantle the entire burner
assemble (see Section 5.5.1- ‘General
Information’)
Δ Use a 3 mm hex bit to remove the 4 bolts from
the 1/2” NPT gas flange. Careful not to damage
the o-ring between the flange and the gas valve.
Δ Use an 8 mm wrench to unscrew the four nuts
securing the electric fan to the gas manifold and
then remove the electric fan, noting the position
of the washer.
Δ Unscrew the 4 torx screws from the venture
and remove the electric fan, paying particular
attention not to damage the blower venture
o-ring.
Δ Replace the electric fan and re-assemble the
components following the above procedure in
reverse order.
Δ Switch on the electricity, water and gas supplies
and check the integrity of the joint by measuring
the CO
2
levels.