Desa VRL24NR Owner's Manual page 16

Natural From Gas Meter
(5" W.C.** to 10.5" W.C.
Pressure)
Propane/LP
From External
Regulator (11" W.C.**
to 14" W.C.
Pressure
3" Min.
Cap Pipe Tee
Nipple Joint
Sediment Trap
Figure 14 - Gas Connection
From
PROPANE/LP
External Regulator
(11" W.C.** to
14" W.C. Pressure)
From Gas
NATURAL
Meter (5" W.C.**
to 10.5" W.C.
Pressure)
Tee Pipe Cap
Joint Nipple
Sediment Trap
Figure 15 - Gas Connection (Remote-
Ready Models Only)
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 41.
** Minimum inlet pressure for purpose of input
adjustment.
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.
16
INSTALLATION
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Gas
Regulator
Approved Flexible Gas
Hose (if allowed by
local codes)
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved
Flexible Gas
Hose (if allowed
by local codes)
3" Minimum
Gas Control Valve
www.desatech.com
Continued
WARNING: Never use an
open flame to check for a leak.
Apply a commercial leak de-
tection solution to all joints.
Bubbles forming show a leak.
Correct all leaks at once.
CAUTION: For propane/LP
units, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under Connect-
ing to Gas Supply, page 14.
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 equip-
ment shutoff valve from gas supply piping.
Pressures in excess of 1/2 psig will dam-
age heater regulator.
2. Cap off open end of gas pipe where equip-
ment 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 sys-
tem. Apply a commercial leak detection
solution 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
fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure
16, page 17).
2. 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.
110021-01S