Johnson Controls ZY Series - Optional Gas Heat; Gas piping

Table 24: ZY12 Physical Data
Model
Component
ZYG12 ZYE12
Nominal Tonnage 10 10
Airflow Option A B C A B C
Quantity 1 1 1 1 1 1
Fan Size (in.) 15 x 15 15 x 15 15 x 15 15 x 15 15 x 15 15 x 15
Type Centrifugal Centrifugal
Motor Sheave 1VL44 1VP50 1VP56 1VL44 1VP50 1VP56
Blower Sheave AK79 AK79 BK85 AK79 AK79 BK85
Belt A50 A50 BX52 A50 A50 BX52
Motor Max Bhp, 3 Phase 2.4 3.7 5.25 2.4 3.7 5.25
RPM 1725 1725 1725 1725 1725 1725
EVAP FAN DATA BELT DRIVE
Frame size 56Y 56HZ 145TY 56Y 56HZ 145TY
FILTERS Quantity - Size
1
4 - (20 x 20 x 2)
1
4 - (20 x 20 x 2)
1
1 2 in. Throwaway, Standard, MERV 4 (Minimum Efficiency Reporting Value).
Optional Gas Heat
These gas-fired heaters have aluminized-steel or
optional stainless steel, tubular heat exchangers
with spark ignition.
Gas piping
Proper sizing of gas piping depends on the cubic
feet per hour of gas flow required, specific gravity
of the gas and the length of run. "National Fuel
Gas Code" Z223.1 (in U.S.A.) or the current Gas
Installation Codes CSA-B149.1 (in Canada) should
be followed in all cases unless superseded by local
codes or gas utility requirements. Refer to Table
25. The heating value of the gas may differ with
locality. The value should be checked with the local
gas utility.
Figure 24: Side Entry Gas Piping
Note: Routing of gas piping must not interfere
with the flue or heat compartment access.
Table 25: Gas Pipe Sizing - Capacity of Pipe
Nominal Iron Pipe Size
Length of
Pipe (ft)
3/4 in. 1 in. 1-1/4 in.
10 278 520 1050
20 190 350 730
30 152 285 590
40 130 245 500
50 115 215 440
60 105 195 400
70 96 180 370
80 90 170 350
90 84 160 320
100 79 150 305
Note: Maximum capacity of pipe in cubic feet
of gas per hour based upon a pressure drop of
0.3 inch W.C. and 0.6 specific gravity gas.
Note: There may be a local gas utility
requirement specifying a minimum diameter
for gas piping. Units require either a 1/2 or 3/4
inch pipe connection at the entrance fitting.
Line should not be sized smaller than the
entrance fitting size.
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A78
Johnson Controls Ducted Systems