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ALL WEATHER
HEATING UNIT
with chilled water coil option
Approximate shipping weight
325 lbs
Allowable clearances from combustible:
6 " from duct side
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Allow clearance for drainage under the u|
24" on other sides
0 " on bottom
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PDS 379.125.3
SIZE 125
36D
12/1/69
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SPECIFICATIONS
The Model 125-379, a 125, 000 Btuh furnace, is AGA listed for outdoor installation. The unit
is also available with a factory installed chilled water coil. The 36D-379 is rated at 36,000
Btuh cooling capacity.
This equipment has been specifically designed for use on applications where a heating unit
suitable for outdoor installation has been specified.
Rated at 125,000 Btuh heating input, this unit is constructed and tailored for conamercial
duty - yet it is ideally suited for residential applications.
Installation does not interfere with other building trades - no inside floor space and no
special vents are required. Just set unit on slab or adequate roof support then connect duct,
gas supply, and electric supply.
The insulated weatherproof cabinet is made from heavy gauge zinc coated steel; the finish is
baked-on enamel. Removable panels allow easy access to all components and controls.
Automatic pilot reignition eliminates the need for service calls just to light the pilot.
A stainless chromized steel heat exchanger promises long life.
Standard equipment includes;
• Blower relay • Condensate pan • Hi-limit control e Adjustable fan control
• Weatherproof insulated cabinet e Combination manual A & В valve and regulator
• Natural D1 and Propane D9 controls • Stainless steel chromized heat exchangers
• Bryant automatic pilot e Blower motor direct drive e Bryant diaphragm gas valve
• Chilled water coil • Electric re-ignition • Slotted port burners • Cooling fan relay
HEATING CAPACITY COMPONENT INFORMATION
Input BTUH
Output BTUH
Approved Temp Rise °F 45 - 75
Air Flow for Indicated Temp Rise at Rated Input
Temp Rise ° F
CFM
45
, 1930
50
1740 1580
60
55
1445
CONNECTIONS
Electrical Power Supply
Min Branch Circiiit Size
Branch Circuit Fuse 15
External Control Power Available:
Gas Supply NPT
Chilled Water Supply (Iron Pipe-female)
. Heating 20 VA
Cooling
AIR DELIVERY PERFORMANCE - Furnace without Coil
CFM
1000 .635
1100
1200 .67
1300
1400
1500 .32
* At 120V without air filters.
External Static
Hi
.58
.46
Pressure Available*
65 70
1338
Med
.47
.18
125,000
93,750
1240 1160
115-60-1
14
None
1/2"
3/4"
Blower Motor
HP 1/3
Speed
Rotation CCW (opp shaft end)
Voltage
Full Load Amps 6.5
Frame
75
Thermal Protection Automatic
Blower Wheel 1
Diameter & Width
Transformer 115-230-24V 40 VA,
Filters *None supplied with unit
WATER COIL
Water Coil
High and wide
Rows
Tube, Copper
Fins, Aluminum 12 per inch
4 speed 1075
120
48
10 X 8
7 00 sq in. min filter area
20-1/8 x 22-1/8
3
3/8" OD
GAS CONTROL INFORMATION
Burners (stainless chromized)
Orifice Drill Size - Natural if 41
Propane
D1 Control - Natural
Regulator Comb. Shut-Off
Valve
Pilot (non 100%) Bryant 733
D9 Control - Propane
Regulator None
Valve
Pilot (non 100%)
Heat Exchanger
Fan Control - Heating Delay Relay
Limit
5 (steel slotted port)
#54
1/2 Thermae VR 1
Bryant 1/2 A 639 B
Bryant 1/2 A 639 B
Bryant 733
Stainless Chromized Steel
SPDT Fixed
1. Transformer
2. Blower Motor
3. Blower Delay Relay
4. Cooling Blower Relay
5. Limit Heating (SPDT)
6. Gas Valve
7. Reignition Pilot 9. Resistor
8. Pilot Gas Pressure Switch 10. Capacitor
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36D-379 DETAILED COOLING CAPACITIES
Air Entering
Chilled Water
Coil 80° DB
Entering
CFM
Wet Btuh
Bulb
Total
71 39.4
1000
1100
67 38.5
63
71
67
35.3
39.4
39.0
63 36.3
71 39.4
1200
67
63
71
39.2
37.0
39.5
1300 67 39.4
37.6
39.5
39.4
38.0
1400
63
-
71
67
63
85
Capacity
X 1000
Sensible Total
Outdoor
20.3
24.8 35.1
28.4 31.9
20.9 36.4
25.8 35.7
29.9 32.7
21.4
26.8 36.0
31.3
22.0
27.6 36.2
32.7 33.9
22.6 37.9
28.5 36.2
34.0
Notes:
1. Sensible heat capacities shown are based on 80F
entering air at the evaporator.
2. Direct interpolation is permissible. Do not extrapolate.
3. To interpolate:
(a) below 80 F DB, subtract 872 Btuh per 1000 efir. for
each degree below 80 F from the listed sensible
capacity.
(b) above 80 F DB, add 872 Btuh per 1000 efra for
each degree above 80 F from the listed sensible
capacity.
Ambient ° F
95 105
Capacity Capacity
Btuh X 1000 Btuh X 1000
Sensible Total Sensible
36.2
19.2 34.6 18.7
23.5 33.1 22.8
27.0
19.9 34.8 19.3 48.3
24.6 33.7 23.9 39.6
28.4 30.4 27.5
36.8
20.6 35.2
25.6 34.0
33.3
37.5
29.8 30.8
21.4 35.6
26.5
31.2 31.5
22.1
27.3 34.4
34.3
32.5
29.6
26.0
20.0 50.5
24.9
28.9 33.5
20.8 52.5
34.3
25.8
30.3
36.2
21.5
26.7
32.0 31.6
WITH A FLOW RATE OF 7.5 GPM
Enter Water Temperature of
40
Capacity
Btuh X 1000 Btuh
Total Sensible
45.9 22.7
37.7 24.5 32.7
30.4
26.4
24.0
26.1 34.4
32.0
28.2 26.3
25.3 45.1
41.4
27.6
29.9 27.5
26.5
43.1
34.8
54.4
44.6
29.0 37.4
31.6 28.6
27.6 48.5
30.4
36.0 33.2
45 50
Capacity Capacity
X 1000
Sensible
Total
41.0
20.9
22.6 25.9
25.0
43.1
24.2 18.3 18.3
22.2 35.9 19.7
24.1 ■ 27.2
25.9
23.4 37.6
36.0 25.6 28.5
27.5 20.2
46.9
24.5
26.9 29.6
28.6
25.6 40.5
38.8
29.6
28.3 30.7
29.6 21.7
4. Formula:
LDB ■ FDB — Sensible Heat Capacity ^Btuh)
1.08 .X cfm
, Total r.apacitv fRluh)
-------------
4:rx cL
---------------
where h = Enthalpy (Btu- lb)
Btuh
X 1000
Total Sensible
34.2 18.5
20.1
21.5
19.3
19.3
20.8
22.9
20.2
39.1
21.9
24.2
21.0
21.0
22.9
25.4
21.7
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36D-379 COOLING CAPACITY
Capacity Total, Btuh
Air Flow, CFM
Ext. S. P., ti. Wg.
Ent. Temp, °F
Water Flow, GPM
Pressure Drop, Ft. Wg.
Eul. Temp, °F
36D-379 WATER PRESSURE DROP
36,000
1200
.4
95
7.5
8.6
45
AIR DELIVERY PERFORMANCE WITH COIL IN PLACE
CFM
1000
1100
1200
1300
140u
1500
External Static Pressure Available*
Pressure drop in feet of water at the flow rotes shown
GPM Pressure Drop
4 *
5 **
6.0 5.8
7.0 7.6
* Priming rate for 3/4’‘ vertical drop return,
** Priming rate for 1" vertical drop return.
Hi Tap
.59
.50
.40
.28
22
.15
* At 120 V wiihoiil air fillers.
2.9
4.2
GPM
7.5
8.0
10.0 14.2
Pressure Drop
8.6
9.6
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