Millennium Enterprises Z33, Z34, Z42 STEAM HEAT, FIGURE 9 - HOT WATER PIPING CROSS-SEC- TION, FIGURE 10

882108-YIM-B-1012

Johnson Controls Unitary Products 19

STEAM HEAT

The YORK Millennium units (25, 30 and 40 Ton sizes) can be

furnished with a YORK single row steam coil. YORK steam

coils are a factory installed option.

NOTE: The steam control valve, power and control wiring to

the actuator of the valve is the responsibility of the

installing party.

PIPING CONNECTIONS

Refer to Tables 46 through 49 and Figures 41 and 42 for flow

rate and capacity.

The steam piping must enter the unit through the floor of the

heat section compartment. The access doors to the compart-

ment are gasketed so the compartment can be sealed. How-

ever, as added protection for condensate leakage into the

space, the piping access holes should be sealed with a heat

resistant mastic. The following figure illustrates the location of

the compartment and piping connections.

DO NOT use tin based solder. Brazing with tin

based solder could cause equipment damage or

possible injury to tenants of the structure that is

being conditioned.

FIGURE 9 - HOT WATER PIPING CROSS-SEC-TIONFIGURE 10 - STEAM PIPING CROSS-SECTION

H O T W A TE R

C O I L

C O N D E N S IN G

S E C T I O N

IN LE T ( 2 ")

O U T L E T ( 2" )

2. 5 5 "

8. 3 8 "

2. 2 5 "

11 . 8 8 "

26"

15 . 8 "

88 . 7 5 "

H E A T S E C T I O N

C O M P A R T M E N T

(1 O R 2 R O W )

O U T S I D E O F

BASE RAIL

STEAM

C O I L

C O N D E N S IN G

S E C T I O N

O U T L E T ( 1 1 /2 " )

2. 5 5 "

8. 3 8 "

26"

1 5 .8 " IN L E T ( 2 " )

H E A T S E C T I O N

C O M P A R T M E N T

88 . 7 5 "

T O P V I E W

O U T S ID E O F

B A S E R A IL

All piping and control valves, and wiring that is

field installed must be properly insulated and con-

form to all local and national codes.

There are no provisions in the coil or control

sequence to prevent freezing of condensate. The

control valve, piping and field installed wiring con-

nections are particularly vulnerable because they

are installed in the vestibule outside of the condi-

tioned air stream. The installing party will be

responsible for properly insulating and installing

power and control wiring, to the actuator and pip-

ing.

DO NOT use steam coils as hot water coils under

any circumstances.

In steam coil systems, the steam pressure shall

not exceed 15 PSI.

Piping access holes should be sealed with a heat

resistant mastic to prevent damage to equipment.

DO NOT use tin based solder. Brazing with tin

based solder could cause equipment damage or

possible injury to tenants of the structure that is

being conditioned.