Raypak HI DALTA HD101 User Manual download pdf (Page 21)

Category II. A heater which operates with a non-posi-

tive vent static pressure and with a vent gas

temperature that may cause excessive condensate

production in the vent.

Category III. A heater which operates with a positive

vent pressure and with a vent gas temperature that

avoids excessive condensate production in the vent.

Category IV. A heater which operates with a positive

vent pressure and with a vent gas temperature that

may cause excessive condensate production in the

vent.

See Table I for appliance category requirements for

the Hi Delta.

Determination of Appliance

Category for Venting Purposes and

Venting Arrangements

2-STAGE

TANKSTAT

STAGE 1

CONNECTION

STAGE 2 CONNECTION OR

STAGE 1 CONNECTION

OF HEATER 2

TTACH STAGE 1 CONNECTIONS ON HEATER

TO STAGE 1 CONNECTION ON TANKSTAT.

ATTACH STAGE 2 CONNECTIONS OR

STAGE 1 CONNECTION OF HEATER 2

TO STAGE 2 CONNECTION ON TANKSTAT

AS SHOWN IN THE DIAGRAM.

Fig. 17: 2-Stage Tankstat

Heater must be electrically grounded in accordance

with NEC and C22.1(in Canada).

NOTES:

1. Field installed ground to inside of junction box.

2. If any of the original wire as supplied with the

heater must be replaced, it must be replaced with

105°C wire or its equivalent.

Venting

General

Definition of Appliance Categories

Heaters are divided into four categories based on the

pressure produced in the exhaust and the likelihood of

condensate production in the vent.

Category I. A heater which operates with a non-posi-

tive vent static pressure and with a vent gas

temperature that avoids excessive condensate pro-

duction in the vent.

CAUTION: Proper installation of flue venting is

critical for the safe and efficient operation of the

heater.

NOTE: For additional information on appliance

categorization, see appropriate ANSI Z21 Standard

and the NFGC (U.S.), or B149 (Canada), or

applicable provisions of local building codes.

WARNING: Contact the manufacturer of the vent

material if there is any question about the appliance

categorization and suitability of a vent material for

application on a Category III or IV vent system.

Using improper venting materials can result in

personal injury, death or property damage.

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