Carrier 48KH - Manual (Page 6)

Fig. 7 — Sediment Trap
5. Install an accessible, external, manual shutoff
valve in gas supply pipe within 6 ft of heating
section. Install a 1/8-in. NPT plugged tapping
that is accessible for test-gage connection imme­
diately upstream from gas supply connection to
heating section and downstream from main
manual shutoff valve.
6. Install ground-joint union close to heating sec­
tion between gas valve and external manual main
shutoff valve.
7. Pressure-test all gas piping in accordance with
local and national plumbing and gas codes before
connecting piping to unit.
NOTE: When pressure-testing the gas supply
system after the gas supply piping has been con­
nected to the unit gas valve, the supply piping
must be disconnected from the gas valve during
any pressure testing of the piping systems at test
pressure in excess of 0.5 in. wg. When pressure
testing the gas supply piping system at test pres­
sures equal to or less than 0.5 in. wg, the unit
heating section must be isolated from the gas
piping system by closing the external main
manual shutoff valve and slightly opening
ground-joint union.
CAO'OON; OfisSiabieopciSiiloiìmayoccitr, ps?-
ttcalarly ajtdej
cosditioas» when gas;
aad maììifoìd assentbiy ate foreed o«t of
while cesitiecSsg iaijwopBriy routed»
gas t-o .gas vidvee Use a bacicap
wcesch wbeti saaktag eosmecisoa to avoid stsais
03R» or dtsiordow of, gas control plpiog,
8. Where permitted by local codes, use an approved
corrugated metal tubing gas connector between
rigid gas piping and gas valve.
WARNING: Never saae a îmtcïi or other o-pen
flaaie when elîeckisg for leaks.
9. Check for gas leaks at all field-installed and
factory-installed gas lines after all piping connec­
tions have been completed. Use soap-and-water
solution (or method specified by local codes and/
or regulations).
Step 3 — Make Duct Connections — Model
48KH,KL has duct flanges on the supply-and return-
air openings on side of unit. See Fig. 4.
WARNING: The design and installation ofdagt
system mmt he in atx-ordancewttit standards of
Natlonai Fire Protecdon Assoctatioo for tw-
staïiaiton of ncm.~restdencetypeatreoodittoaEiing
and ventilating systems» NFPA Nox9ê; or
residence-type NFPA No. 90 &; aad/ttr h>cai
codes and ordlsaxtces.
Adhere to the following requirements when selec­
ting, sizing and installing duct system:
1. Select and size ductwork, supply-air registers and
return-air grilles according to ASHRAE recom­
mendations and as presented in Carrier System
Design Manual, Part 2. System airflow must be
within range of temperature rise and external
static pressure shown on unit AGA rating plate.
CAÏJTEON: Whca doct~systcm fasteaiag
holes are drilled into side of Model dSKBXL
mstead of the tmit ddct fiaages, lise extreme
care to avoid panctoriag ood or cod tubes.
2. Use a flexible transition between rigid ductwork
and unit to prevent transmission of vibration.
The transition may be screwed or bolted to duct
flanges. Use suitable gaskets to ensure a weather-
tight and airtight seal.
Table 2 — Filter Sizes (Field Supplied),
Size Sq In.*
STANDARD CLEANABLE OR
MODEL 48— DISPOSABLE HIGH CAPACITY
TYPE TYPE
KL.018300BE 300 187
KL024300BE 400 257
KH024300BE 400 260
KL030300BE 522 339
KH030300BE 522 339
KL036300BE 576 374
KL036500CE 576 374
KL036600CE 576 374
KH036300BE 583 379
KH036300BF 722 451
KH036500CE 576 374
KH036500CF 694 451
KL042300BE ~
. .. _
43У
KL042500CE 672 437
KH042300BE 672 437
KH042500CE 672 437
KL04830ÒBE 768 ~~ 499"
KL048500CE 768 499
KL048600CE 768 499
KH048300BE/BF 768 499
KH048500CE/CF 768 499
KL060300BE
95d
618 ’
KH060300BE/BF 950 618
^Recommended air filter areas shown are based on either the ARI-
rated cooling airflow or the heating airflow at a velocity of 300 fpm
depending on whichever value is larger Air filter pressure drop
should not exceed 0 08 in wgfor unit to produce the rated cooling
performance