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246653-YTG-E-0108
Johnson Controls Unitary Products 13
TABLE 7: MODULATING HEAT
STAGES OF GAS CONTROL (% OF FULL HEAT OUTPUT)
G
AS HEAT OPTION AVAILABLE ON MODELS STEP INPUT OUTPUT % OF TOTAL OUTPUT
D3
(Turn down ration
3.8 to 1)
Y32, Y33, Y34
1 69,333 55,466 26%
2 106,666 85,333 40%
3 165,332 132,266 62%
4 202,665 162,132 76%
5 229,332 183,466 86%
6 266,666 213,333 100%
D5
(Turn down ration
7.7 to 1)
Y32, Y33, Y34
1 69,333 55,466 13%
2 106,666 85,333 20%
3 165,332 132,266 31%
4 202,665 162,132 38%
5 229,332 183,466 43%
6 266,666 213,333 50%
7 325,331 260,265 61%
8 362,664 290,132 68%
9 389,331 311,465 73%
10 426,664 341,331 80%
11 495,997 396,798 93%
12 533,330 426,664 100%
D8
(Turn down ration
11.5 to 1)
Y34 Only
1 69,333 55,466 9%
2 106,666 85,333 13%
3 165,332 132,266 21%
4 202,665 162,132 25%
5 229,332 183,466 29%
6 266,666 213,333 33%
7 325,331 260,265 41%
8 362,664 290,132 45%
9 389,331 311,465 49%
10 426,664 341,331 53%
11 495,997 396,798 62%
12 533,330 426,664 67%
13 586,663 469,330 73%
14 655,996 524,797 82%
15 693,329 554,663 87%
16 762,662 610,130 95%
17 799,995 639,996 100%
TABLE 8: ELECTRIC HEATING CAPACITIES
ELECTRIC
HEAT OPTION
AVAILABLE ON MODELS RATED VOLTAGE
NOMINAL
KW
N
OMINAL
MBH
1
1.
Supply air fan motor heat not included.
MBH
AND KW PER STAGE
2
2.
Heating capacity is only staged on CV models. VAV models use only one stage at full capacity.
S
TAGE 1STAGE 2
KW MBH KW MBH
E4 Y32, Y33, Y34 240
3
/480
4
/575
3.
For 208 volts, multiply kW and MBH values by .751. For 230 volts, multiply kW and MBH values by .918
4.
For 460 volts, multiply kW and MBH values by .918.
40 137 40 137 0 0
E8 Y32, Y33, Y34 240
2
/480
3
/575 80 273 40 137 40 136
E1 Y32, Y33, Y34 (460 & 575 volt only) 480
3
/575 108 369 72 246 36 123