HHP PBNU-LD20P100 설치 지침 매뉴얼 - 페이지 10
{카테고리_이름} HHP PBNU-LD20P100에 대한 설치 지침 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. HHP PBNU-LD20P100 20 페이지. Gas-fired furnaces high-efficiency upflow condensing models
페이지 인쇄The furnace and its individual shutoff valve must be dis' c on
nected from the gas supply piping system during any pressu�e
(3.48
The furnace must be isolated from the gas supply piping
system by closing its individual external manual shutoff valve
during any pressure testing of the gas supply piping system at
pressures equal to or less than
Gas piping may be connected from either side of the furnace.
Sizing and installation of the supply gas line should comply with
the local utility requirements. The gas supply should be a
separate line, installed in accordance with the N ational Fuel
Gas Code, ANSI
or CAN
Z223. 1
Codes (latest editions).
Some utility companies require pipe sizes larger than. the
maximum sizes listed. Using the properly sized wrought non,
steel or approved flexible pipe, make gas connections to the
unit. Installation of a drop leg and ground union joint is required
{see Figure
9).
WARNING:
Compounds used on threaded joints of gas piping
must be resistent to the action of liquified petroleum gases.
After connections are made, leak-test all pipe connections.
TOGAS
SUPPlY
GAOUND J(){l{f U'IION
1M Y BE INST AliED
DROP lEG
INSIDE OR OVTSlOE UNIT
*NOTE:
112'
Unit is supplied with
'street ell.' Wher
a
be
a pipe nipple and elbow may
used. Use
of
extending side opening
casing for proper clearance.
GAS PIPING
9-
FlGURE
WARNING:
Do not use an open flame or other source of
ignition for leak testing. Set the manual gas valve to the
OFF position.
INLET GAS PRESSURE
Natural
-
-
Minimum
4.51n. W.C.
Maximum
10.51n. W.C.
CONDENSATE PIPING
lower right front corner of the blower compartment. It consists
knockout is provided above the original location if the added.
if this alternate location is used,
The·installatiort pro ce dure for condensate piping is as follows:
1. Determine w hether the condensate -drain line will be in
stalled through the right or left side of !he furnace.
Unitary Products Group
ps1g
1 /2
.
kPa).
psig
1 /2
(3.48
or .2 installation
1
1 49. 1
8
·
e
•strE*t ell's' are not allowed,
of
nipple and elbow may require field
Gas
111n.W.C.
ln. W.C.
1 3.5
Carefully remove the
2.
3/4"
appropriate side of the furnace. Two knockouts are pro·
vided on each side, one located toward the lower right front
of the blower compartment, the other is located above the
first.
Dra·in
Hoses
controls box.
FIGURE 10 ·CONDENSATE DRAIN CON NECTION
For !eft side or alternate drain connection, it will be neces
3.
sary to relocate the condensate drain connection assembly.
a. Remove the two screws that secure the drain connec
tion bracket to the right side panel {see Figure
b. Position the bracket over the corresponding holes in
the left side panel (new holes must be drilled for alter
nate locations), and fasten it to the side panel using the
two screws previously removed.
c. Make sure the flexible tubing between the drain trap
mounted on the blower and the drain connection as
sembly has a continuous downward slope to the drain
connection assembly, has no low spots, and is no:
kinked. (If necessary, shorten the flexible tubing tc
prevent kinking and/or low spots that could restrict thE
flow of condensate.
4. Connect field-supplied piping to the condensate drair
connection assembly and run it to an open drain. Refer tc
the "Vent/Combustion Air Connections• section of this
instruction for procedure for assembly. of plastic pipe. ThE
manufacturer recommends 112•
field installed drain pipe. The· condensate piping may be
tied together with the air conditioning condensate drainii
the air conditioning condensate drain line is trapped up
stream of the tie-in and the combined drains are con·
structed of the same material.;·
5. All pipe joints must
cleaned, de:-bi.lrred and cemeotec
be
using CPVC primer and cement.
The furnace contains an internal trap. Therefore, no exter
6.
nat trap should be used.
7. If a condensate pump is used
with acidic water.
Where required, a field-�t.i p plied neutralize r can be in
8.
stal!ed in the drain line, external to the furnace .
650.65-N2
.diameter knockout from the
Rem
ve these tw:
o
screws to change
co n
de
e
nsat
dra1n
the
connection to
lett side.
1 0).
·
or equivalent
I.D. CPVC
.. -<
:
it must be suit
�
b!e for usE