Desa BG30NT ユーザーズマニュアル

www.desatech.com

114683-01B

* A CSA design-certiﬁed equipment shutoff valve

with 1/8" NPT tap is an acceptable alternative to

test gauge connection. Purchase the optional CSA

design-certiﬁed equipment shutoff valve from your

dealer. See Accessories, page 30.

CHECKING GAS CONNECTIONS

WARNING: Test all gas piping

and connections, internal and

external to unit, for leaks after

installing or servicing. Correct

all leaks at once.

Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap

Test Gauge Connection*

3/8" NPT
Pipe Nipple

Heater
Cabinet

Equipment
Shutoff
Valve*

3" Min.

Natural Gas
From Gas Meter
(4" W.C. to 10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C. to 14" W.C.
Pressure)

Ground Joint
Union

IMPORTANT:

Hold the pressure regulator with

wrench when connecting it to gas piping and/or

ﬁttings. Do not over tighten pipe connection to

regulator. The regulator body could be damaged.

Tee Joint
Pipe
Nipple
Cap

Sediment

rap

INSTALLATION

Continued

WARNING: Never use an

open ﬂame to check for a leak.

Apply a noncorrosive leak detec-

tion ﬂuid to all joints. Bubbles

forming show a leak. Correct all

leaks at once.

CAUTION: For propane/LP

gas, make sure external regula-

tor has been installed between

propane/LP supply and heater.

See guidelines under

Connect-

ing to Gas Supply, page 12.

PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance main

gas valve (control valve) and equipment

shutoff valve from gas supply piping system.

Pressures in excess of 1/2 psig will damage

heater regulator.

2. Cap off open end of gas pipe where equipment

shutoff valve was connected.

3. Pressurize supply piping system by either

opening propane/LP supply tank valve for

propane/LP gas or opening main gas valve

located on or near gas meter for natural gas

or using compressed air.

4. Check all joints of gas supply piping system.

Apply a noncorrosive leak detection ﬂuid to

all joints. Bubbles forming show a leak.

5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff

valve to gas supply. Check reconnected ﬁt-

tings for leaks.

Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 16).

Figure 15 - Gas Connection

Figure 16 - Equipment Shutoff Valve

Open

Closed

Equipment
Shutoff Valve

Pressure
Regulator