Chapter 7 gas piping, Warning, 29 gas supply piping connection – AERCO Esteem O&M Manual User Manual
Page 35: Gf-125
29
Gas Supply Piping Connection
N
OTICE
The gas supply piping must be installed
in accordance to all local, state and na-
tional codes and utility requirements.
1. Install a 1” NPT for the pipe union at the
factory supplied gas nipple, for ease of
service.
2. Install a manual shutoff valve in the gas
supply piping as shown in Figure 17. For
Canadian installations the main shutoff
valve must be tagged and identified by
the installer
3. Install a sediment trap (drip leg) on the
gas supply line prior to connecting to the
Esteem 399 Low NOx gas train as shown
in Figure 17.
4. Support the gas piping using hangers. Do
not support the piping by the unit or its
components.
5. Purge all air from the gas supply piping.
6. Before placing the boiler into operation,
test all connections for leaks.
• Close the manual shutoff valve during
any pressure test with less than 13”w.c..
• Disconnect the Esteem 399 Low NOx
and its gas valve from the gas supply
piping during any pressure test greater
than 13”w.c..
WARNING!
D
O
NOT
CHECK
FOR
GAS
LEAKS
WITH
AN
OPEN
FLAME
. U
SE
A
GAS
DETECTION
DEVICE
OR
BUB
-
BLE
TEST
. F
AILURE
TO
CHECK
FOR
GAS
LEAKS
CAN
CAUSE
SEVERE
PERSONAL
INJURY
,
DEATH
OR
SUBSTANTIAL
PROPERTY
DAMAGE
.
7. Use pipe dope compatible with natural
and propane gases. Apply sparingly only
to the male threads of pipe joints so that
pipe dope does not block gas flow.
WARNING
F
AILURE
TO
APPLY
PIPE
DOPE
AS
DETAILED
ABOVE
CAN
RESULT
IN
SEVERE
PERSONAL
IN
-
JURY
,
DEATH
OR
SUBSTANTIAL
PROPERTY
DAM
-
AGE
.
WARNING!
U
SE
A
TWO
-
WRENCH
METHOD
OF
TIGHTENING
GAS
PIPING
NEAR
THE
UNIT
AND
ITS
GAS
PIPING
CONNECTION
. U
SE
ONE
WRENCH
TO
PREVENT
THE
BOILER
GAS
LINE
CONNECTION
FROM
TURN
-
ING
AND
THE
SECOND
TO
TIGHTEN
ADJACENT
PIPING
. F
AILURE
TO
SUPPORT
THE
BOILER
GAS
PIPING
CONNECTION
COULD
DAMAGE
THE
GAS
LINE
COMPONENTS
.
Figure 17: Recommended Gas Supply Piping
Chapter 7
Gas Piping
GF-125