Raypak 992B-1262B manual Potable Water and Space Heating

Potable Water and Space Heating

CAUTION: When this heater is used for both potable water and space heating, observe the following to ensure proper operation.

1.All piping materials and components connected to the water heater for the space heating application shall be suitable for use with potable water.

2.Toxic chemicals, such as used for boiler treatment, shall not be introduced into the potable water used for space heating.

3.If the heater will be used to supply potable water, it shall not be connected to any heating system or components previously used with a non-potable water heating appliance.

4.When the system requires water for space heating at temperatures higher than 140°F, a means such as a mixing valve shall be installed to temper the water in order to reduce scald hazard potential.

Fig. 13: Single Domestic Hot Water Heater and Storage

Tank

Pool Heating

CAUTION: Power to the heater should be interlocked with the main system pump to make sure the heater does not fire without the main system pump in operation. Improper flow control can damage the heater. Uncontrolled flow (too high) or restricted flow (too low) can seriously damage the heater. Follow these instructions to make sure your heater is properly installed.

The Hi Delta pool heater is equipped with an external pump and bypass arrangement as standard equip- ment. This arrangement blends outlet water with the inlet water to increase the inlet water temperature, thereby reducing the likelihood of condensation form- ing on the heat exchanger. The pump also serves to

Model	Soft (0-4 grains per gallon)					Medium (5-15 grains per gallon)					Hard* (16-25 grains per gallon)
No.	T	gpm	P	MTS	SHL	T	gpm	P	MTS	SHL	T	gpm	P	MTS	SHL
992B	28	60	2.7	2	4.6	20	83	5.2	2	8.6	13	132	13.1	2	21.0
1262B	30	72	4.4	2	7.0	20	106	9.6	2	14.8	16	132	14.8	2	22.7
1532B	30	86	7.1	2	10.7	20	132	16.5	2	24.4	20	132	16.5	2	24.4
1802B	30	101	10.7	2	15.5	23	132	18.3	2	26.1	23	132	18.3	2	26.1
2002B	30	112	13.9	2	19.7	26	132	19.0	2	26.9	26	132	19.0	2	26.9
2072B	30	116	14.8	2	21.0	27	132	19.0	2	26.9	27	132	19.0	2	26.9
2342B	30	132	21.4	2	29.3	30	132	21.4	2	29.3	30	132	21.4	2	29.3

ΔT = Temperature rise, °F

ΔP = Pressure drop through heat exchanger, ft

SHL = System head loss, ft (based on heater and tank placed no more than 5 ft apart and equivalent length pipe/fittings of 2 1⁄2” tube = 25 ft)

gpm = Gallons per minute, flow rate MTS = Minimum tubing size

*Must utilize optional cupro-nickel tubes. If over 25 grains per gallon, a water softener/treatment system must be utilized.

Caution: For scale free operation with "Hard Water" (16-25 grains per gallon of total hardness), the operating control must NOT be set higher than 130 F. For higher than 130 F operation, a water softener/treatment system must be utilized.

Table H: Domestic Water Heater Flow Rate Requirements

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