GLOW T-150, Installation & Operation Manual

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Glow T150 & T180
Tankless Condensing Water Heater
24
Figure 3.4 Inlet Screen
3.4.2 Thermal Expansion Device
If this water heater is installed in a closed water supply
system, such as one having a back-flow preventer
in the cold water supply, provisions must be made
to control thermal expansion. DO NOT operate this
water heater in a closed system without provisions for
controlling thermal expansion.
3.4.3 Inlet Screen
This unit comes complete with a water inlet screen
which is factory installed in the cold water inlet fitting.
Do not operate this unit
without the inlet screen in
place. Doing so can and
will cause serious damage
to the unit and will void the
warranty. Should there be
reduced water flow than
what is expected, the water
3.4.1 Water Supply Quality
CAUTION: This water heater MUST
ONLY be used with the following water
supply conditions to prevent product damage
and operation failure.
Δ Clean, potable water free of corrosive chemicals,
sand, dirt or other contaminants.
Δ Inlet water temperatures above 0°C (32°F), but
not exceeding 49°C (120°F)
Δ DO NOT reverse the HOT and COLD water
connections
Δ DO NOT connect this water heater to water lines
previously used for space heating. All water
piping and components shall be suitable for
potable water.
Δ With recommended water quality (see table 3.1)
Table 3.1
Water Quality Chart
pH 6.5-8.5
TDS (Total Dissolved Solids) Up to 500 mg/L
Free Carbon Dioxide (CO2) Up to 15 mg/L
Total Hardness Up to 150 mg/L
Aluminum Up to 0.2 mg/L
Chlorides Up to 200 mg/L
Copper Up to 1.0 mg/L
Iron Up to 0.3 mg/L
Manganese Up to 0.05 mg/L
Zinc Up to 1.0 mg/L
inlet screen may be dirty and needs to be removed,
cleaned or replaced. (see fig. 3.4)
3.4.4 Water Supply Conditions
CAUTION: IMPORTANT
– Do not apply
heat to the HOT and COLD water connections. If
connections are used, solder tubing to the adapter
before fitting the adapter to the water connection
on the water heater. Any heat applied to the water
supply fittings will permanently damage the internal
components of the water the water.
Plumbing should be carried out by a qualified
plumbing professional in accordance with local codes.
Only use approved plumbing materials.
To conserve energy and to prevent freezing, insulate
both HOT and COLD water supply lines. Do not
insulate the drain line or pressure relief valve.
IMPORTANT
–
Anti scald mixing valve
must be installed and as per local codes and
authorities.
3.4.5 Condensate Drain
Δ The
Glow
water heater is a high efficient gas
appliance that creates condensation when it
operates. A condensate trap and flexible drain
pipe come with each water heater and must be
installed below the cabinet.
The condensate trap must be primed before
operation to prevent exhaust gases from
entering the building. (see Section 4.4)
Δ Follow your local code with regards to the
disposal of condensation.
Δ Here are several options for disposal of
condensate:
• From tankless water heater direct to drain
• From tankless water heater to neutralizer to
drain.
• From tankless water heater to laundry tub
(bottom of water heater must be above
the height of the laundry tub; must have a
negative slope to properly drain).
• From tankless water heater to condensate
pump to laundry tub (for long distances
between water heater and laundry tub or
when bottom of the water heater is installed
below height of the laundry tub).
Δ Failure to install the condensate discharge
properly will affect the reliability of the water
heater.