REGULATION INSTRUCTIONS
22
3.5 Domestic hot water circuit/Condensate Drain
Warning/ Hard Water
If this water heater is installed in an application where the supply water is hard, it must be treated with either a
water softener and filtration, which removes the hardness or by using sequestering agents that reduce the
amount of scale deposits.
Damage to the water heater as a result of water in excess of 14.5 gpg (250mg/L) of hardness is not covered by
FLOWMAX Limited warranty. If there a problem with the water quality, contact your local water conditioning
company for equipment to condition the water supply to this appliance
The cold water supply pressure at the inlet to the water heater must be between 7.25 psi (0.5 bar) and 87 psi (6
bar).
In areas with higher water inlet pressure a pressure reducing valve must be fitted before the water heater.
The frequency of the heat exchanger coil cleaning depends on the hardness of the mains water supply and the
presence of residual solids or impurities, which are often present in the case of a new installation. If the characteristics
of the mains water supply are such that require it to be treated, then the appropriate treatment devices must be
installed, while in the case of residues, an in-line filter should be sufficient.
Central heating circuit
In order to prevent scaling or deposits in the primary heat exchanger, the mains supply water to the heating circuit
must be treated according to the requirements of local standards.
This treatment is indispensable in the case where the circuit is frequently topped-up or when the system is often either
partially or fully drained.
Condensate Drain
■ FLOWMAX water heater is a high efficient gas appliance that creates condensation when it operates. A
condensate trap and flexible drain pipe comes factory installed inside each water tank.
The condensate trap must be primed before operation to prevent exhaust gases from entering the building.
■ Follow your local code with regards to the disposal of condensation
■ Here are several options for disposal of condensate
o From combination water heater direct to drain
o From combination water heater to neutralizer to drain
o From combination 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)
o From combination 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)
■ Failure to install the condensate discharge properly will affect the reliability of the water heater.
For all units installed with vertical exhaust, must have an additional approved condensate drain. Fittings must
be ULC S636 approved.
Failure to properly connect the condensate line will cause combustion gases to enter the room, possibly
causing serious injury to occupants or death.
Note: Check with your municipality, local codes, or local gas company to determine if disposal of
combustion condensate is permitted. In the State of Massachusetts the condensate must be
neutralized prior to entering a drain
■ Use only PVC, vinyl or CPVC pipe for the condensate drain line, metal pipe work is not suitable for condensate
discharge system.
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