York Y33 User Manual download pdf (Page 14)

246653-YTG-E-0108

14 Johnson Controls Unitary Products

HOT WATER HEATING

The YORK Millennium Rooftop units (30 - 40 Ton sizes) can

be furnished with a YORK hot water coil as the source of heat

(Bottom Supply Only). A one or two row coil will be factory

installed in the heating section downstream of the supply air

fan and just above the supply air opening in the bottom of the

unit.

The hot water control valve will not be provided. The installer

will need to field supply a water valve. The installer must also

connect the hot water piping, and valve wiring at the job site

for the hot water heat section to be operational.

For all hot water coils the entering water temperature should

not exceed 200°F.

PHYSICAL DATA HOT WATER COIL - 1 ROW

Coil Casing . . . . . . . . . . . . . . . . . . . . Galvanized Steel

Coil Construction. . . . . . . . . . . . . . . . Al Fin / Cu. Tube

Rows Deep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Fin Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . .006”

Tube Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .016”

Tubes / Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Fins Per Inch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Tubes High . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.50”

Tube Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65”

Face Area . . . . . . . . . . . . . . . . . . . . . . . . . . . .10.16ft.

Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71lbs.

Operating Weight . . . . . . . . . . . . . . . . . . . . . . . .83lbs.

NOTE: Water pressure drop numbers are based on 60°F

entering air temperature, 2.00” maximum air pres-

sure drop across the hot water coil(s). ARI certified

ratings at covering other conditions are available

upon request. Hot water coils are approved for use

with glycol (rates available upon request).

PIPING CONNECTIONS

The hot water piping must enter the unit through the floor of

the heat section compartment. The access doors to the com-

partment are gasketed so the compartment can be sealed.

However, as added protection for water leakage into the

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

resistant mastic (see the following illustration for approximate

location of the compartment and piping connections.

1. Hot water, steam or electric heat is not available for

front or rear supply.

TABLE 9: WATER PRESSURE DROP (1 ROW, 25 &

30 TON)

GPM 102030 40

ATER PRESSURE DROP 0.9 3.0 6.0 10.0

TABLE 10: STATIC RESISTANCE HOT WATER COIL

(25 & 30 TON)

CFM 6000 8000 10000 15000

IR PRESSURE DROP 1 ROW 0.07 0.11 0.16 0.32

IR PRESSURE DROP 2 ROW 0.14 0.23 0.33 0.65

DO NOT use tin based solder. Brazing with tin

based solder could cause equipment damage or

possible injury to OCCUPANTS of the structure

that is being conditioned.

TABLE 11: HOT WATER COIL (1 ROW, 25 & 30

TON)

Based on 60°F entering air temperature, 2.00” maximum pres-

sure drop across the hot water coil.

GPM CFM

APACITY (MBH) AT ENTERING WATER

EMPERATURE

140 °F 160 °F 180 °F 200 °F

6000 91.4 115.3 139.3 163.6

8000 102 128.8 155.8 182.9

10000 110.4 139.5 168.8 198.4

12000 117.3 148.4 179.6 211.2

15000 125.9 159.2 192.9 226.9

6000 103 129.4 156 182.7

8000 116.8 147 177.2 207.7

10000 128.2 161.3 194.7 228.2

12000 137.8 173.6 209.5 245.6

15000 150 189 228.2 267.8

6000 107.6 135 162.5 190.1

8000 122.8 154.3 185.8 217.5

10000 135.5 170.3 205.1 240.2

12000 146.4 184 221.8 259.7

15000 160.3 201.6 243 284.8

6000 110.1 138 166 194.1

8000 126.1 158.2 190.5 222.8

10000 139.6 175.2 210.9 246.8

12000 151.2 189.8 228.5 267.5

15000 166.1 208.6 251.3 294.1

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 95 96

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