Thomas & Betts LDAP 1200 Manuale Utente
Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 10
Installing Louvers
NOTE: Do not install louvers
if installing a nozzle. Follow
the instructions shipped with
the nozzle.
if installing a nozzle. Follow
the instructions shipped with
the nozzle.
Louver Installation Instructions:
1) With the wider section of the louver facing out of the heater, place one of the compres-
sion springs over the tab on the notched end of a louver. The end of the louver with the
spring will fit in any direction in the square opening. How the louver turns depends on
which end of the louver is inserted first.
spring will fit in any direction in the square opening. How the louver turns depends on
which end of the louver is inserted first.
2) Depending on the throw pattern selected, push the louver tab with the spring into a
hole in the discharge opening and insert the louver tab on the other end into the
corresponding hole on the opposite side.
corresponding hole on the opposite side.
3) Continue until all louvers are installed.
Adjust the louvers to provide the
desired throw pattern.
Airflow direction;
springs are on
the upper end.
Airflow direction;
springs are on
the lower end.
Wider side of the louver
blade must always be
facing out of the heater.
Compression Spring
FIGURE 6 - Use
Compression Springs to
Install Louvers in the
Discharge Opening(s)
Compression Springs to
Install Louvers in the
Discharge Opening(s)
CAUTION: To avoid getting
burned, adjust louvers while
heater is not operating. If
adjusting louvers while
heater is operating, wear
gloves.
burned, adjust louvers while
heater is not operating. If
adjusting louvers while
heater is operating, wear
gloves.
After the unit is suspended/mounted, install the air directional louvers or optional
nozzle. If an optional nozzle is being installed, follow the instructions included with
the nozzle. If a nozzle is not being used, install the louvers in the discharge opening(s).
Louvers and springs are in the hardware kit shipped with the heater.
Before actually installing the louvers, note the louver curve and determine how the
louvers should be positioned to provide the optimal throw pattern. Opening is square
so louvers may be installed either horizontal or vertical. Louvers may be installed
with the curve all the same direction (either way) or the right half one way and left
the other as illustrated in FIGURE 6.
nozzle. If an optional nozzle is being installed, follow the instructions included with
the nozzle. If a nozzle is not being used, install the louvers in the discharge opening(s).
Louvers and springs are in the hardware kit shipped with the heater.
Before actually installing the louvers, note the louver curve and determine how the
louvers should be positioned to provide the optimal throw pattern. Opening is square
so louvers may be installed either horizontal or vertical. Louvers may be installed
with the curve all the same direction (either way) or the right half one way and left
the other as illustrated in FIGURE 6.
Airflow direction depends on
how the louvers are installed.
how the louvers are installed.
WARNING: This appliance is equipped for a maximum gas supply
pressure of 1/2 psi, 3.5 kPa, or 14 inches water column. Supply
pressure greater than 1/2 psi requires installation of an additional
lockup-type service regulator external to the heater.
pressure of 1/2 psi, 3.5 kPa, or 14 inches water column. Supply
pressure greater than 1/2 psi requires installation of an additional
lockup-type service regulator external to the heater.
WARNING: PRESSURE TESTING SUPPLY PIPING
Test Pressures Above 1/2 PSI: Disconnect the heater and manual valve from the
gas supply line which is to be tested. Cap or plug the supply line.
Test Pressures Below 1/2 PSI: Before testing, close the manual valve on the heater.
gas supply line which is to be tested. Cap or plug the supply line.
Test Pressures Below 1/2 PSI: Before testing, close the manual valve on the heater.
12. Gas Piping
and
Pressures
Pressures
Sizing Gas Supply
Line
Line
Capacity of Piping - Cubic Feet per Hour based on 0.3" w.c. Pressure Drop
Specific Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft)
Specific Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft)
Length
Diameter of Pipe
of 1"
1-1/4"
1-1/2"
2"
2-1/2"
Pipe
Natural Propane Natural Propane Natural Propane Natural Propane Natural Propane
20'
350
214
730
445
1100
671
2100
1281
3300
2013
30'
285
174
590
360
890
543
1650
1007
2700
1647
40'
245
149
500
305
760
464
1450
885
2300
1403
50'
215
131
440
268
670
409
1270
775
2000
1220
60'
195
119
400
244
610
372
1105
674
1850
1129
70'
180
110
370
226
560
342
1050
641
1700
1037
80'
170
104
350
214
530
323
990
604
1600
976
90'
160
98
320
195
490
299
930
567
1500
915
100'
150
92
305
186
460
281
870
531
1400
854
125'
130
79
275
168
410
250
780
476
1250
763
150'
120
73
250
153
380
232
710
433
1130
689
175'
110
67
225
137
350
214
650
397
1050
641
200'
100
61
210
128
320
195
610
372
980
598
Note: When sizing supply lines, consider possibilities of future expansion and increased requirements.
Refer to National Fuel Gas Code for additional information on line sizing.
WARNING: All com-
ponents of a gas supply
system must be leak
tested prior to placing
equipment in service.
NEVER TEST FOR
LEAKS WITH AN OPEN
FLAME. Failure to
comply could result in
personal injury, property
damage or death.
ponents of a gas supply
system must be leak
tested prior to placing
equipment in service.
NEVER TEST FOR
LEAKS WITH AN OPEN
FLAME. Failure to
comply could result in
personal injury, property
damage or death.
11. Installing
Heater and
Louvers
(cont’d)
Louvers
(cont’d)