Technical Guide

251933-YTG-V-0913
Johnson Controls Unitary Products 57
Belt Drive RPM Selection
Size
(Tons)
Model HP
Max
BHP
Motor
Sheave
Blower
Sheave
5 Turns
Open
4 Turns
Open
3 Turns
Open
2 Turns
Open
1 Turn
Open
Fully
Closed
036
(3)
ZF/ZR
1.5 1.73 1VL44 AK64 805 865 920 980 1035 1095
1.5 1.73 1VP56 AK66 1115 1170 1225 1280 1335 1390
048
(4)
ZF/ZR
1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260
1.5 1.73 1VP56 AK61 1210 1270 1330 1390 1455 1515
060
(5)
ZF/ZR
1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260
2 2.3 1VP56 AK56 1325 1395 1460 1525 1590 1660
072
(6)
ZF
1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260
3 3.45 1VP56 AK56 1325 1395 1460 1525 1590 1660
036
(3)
XP
1.5 1.73 1VL44 AK64 805 865 920 980 1035 1095
1.5 1.73 1VP56 AK66 1115 1170 1225 1280 1335 1390
048
(4)
XP
1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260
1.5 1.73 1VP56 AK61 1210 1270 1330 1390 1455 1515
060
(5)
XP
1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260
2 2.3 1VP56 AK56 1325 1395 1460 1525 1590 1660
Additional Static Resistance
Size
(Tons)
CFM Cooling Only
1
1. Add these values to the available static resistance in the respective Blower Performance
Tables (ZF, ZR Only).
Economizer
2 3
2. Deduct these values from the available external static pressure shown in the respective
Blower Performance Tables.
3. The pressure drop through the economizer is greater for 100% outdoor air than for 100%
return air. If the resistance of the return air duct is less than 0.25 IWG, the unit will deliver
less CFM during full economizer operation.
Electric Heat kW
2
7 - 15 20 - 30
036 (3.0)
048 (4.0)
060 (5.0)
072 (6.0)
1000 0.08 0.07 0.04 0.06
1200 0.10 0.08 0.05 0.07
1400 0.12 0.09 0.06 0.08
1600 0.14 0.11 0.07 0.09
1800 0.16 0.13 0.08 0.11
2000 0.18 0.15 0.10 0.13
2200 0.20 0.17 0.12 0.15
2400 0.23 0.20 0.14 0.17
2600 0.26 0.23 0.16 0.20
2800 0.29 0.26 0.19 0.23
3000 0.32 0.30 0.22 0.26