York DH 300 User Manual

262260-YTG-E-1008

34

Johnson Controls Unitary Products

1-1/8” KO

Control Wiring

Side

3/4” NPS (Fem.)

Bottom

3-5/8” KO

Power Wiring

Side

3” NPS (Fem.)

Bottom

2-3/8” KO

Gas Piping (Front)

1

1. One-inch gas piping NPT required.

1-11/16” Hole

Gas Piping (Bottom)

,  

2

 

2. Opening in the bottom of the unit can be located by the slice in 

the insulation.

NOTE:

All entry holes should be field sealed to prevent rain 
water entry into the building.

RET URN

A IR

SUP P L Y 

A IR

BOT T OM S UP P L Y 

A ND  R ET URN

A IR  O P ENINGS

(See N ote)

(B)
P OWER W IRING
ENT RY 

(A )
CONT ROL   W IRING
ENT RY 

NOT E:
For c urb m ounted u nits, r efer to  th e c urb h anger
dimensions o f th e c urb fo r th e p roper s ize o f th e
supply a nd r eturn a ir d uct c onnections.

UNIT  B A SE  W IT H R A IL S
Shown s eparately to  i llustrate
Bottom D uct o penings, P ower
and G as P iping C onnection
locations

12-1/2"

9-1/4"

8-1/8"

9-3/4"

3-3/4"

(B)
P OWER W IRING
ENT RY 

(A )
CONT ROL   W IRING
ENT RY 

CONDENSER
COIL S

OP T IONA L   C OIL 
GUA RD  K IT 

COMP RESSOR
A CCESS
(See d etail " X")

ECONOMIZER / M OT ORIZED D A MP ER,
FIXED O UT DOOR IN T A KE A IR A ND
P OWER E XHA UST  R A IN  H OODS
(See d etail " Y ")

FIELD-SUPPLIED
DISCONNECT SWITCH
LOCATION

BLOWER
COMPARTMENT
ACCESS
(Auxiliary)

DOT  P L UG
(For p ressure
Drop R eading)

FRONT 
VIEW

CONT ROL   B OX
A CCESS

21"

5"

9-3/4"

11-1/2"

2-3/4"

21-1/2"

33"

35"

5-7/8"

46-5/8"

7-1/8"

6-3/8"

VENT  A IR
OUT L ET 
HOODS

COMBUST ION
A IR  IN L ET 
HOOD

GA S  H EA T 
A CCESS

(C)
GA S  S UP P L Y 
ENT RY 

46-5/8"

11-1/8"

(D)
GA S  S UP P L Y 
ENT RY 

RET URN A IR

SUP P L Y  A IR

OUT DOOR A IR

OUT DOOR A IR
(Economizer)

92"

24-1/4" (15 

Ton)

35-1/4" (17.5 

    thru 25 

Ton)

125-1/4" (15

 T

on)

136-1/4" (17.5

         thru 25 

Ton)

48-5/8" (15 Ton) 
52-5/8" (17.5 thru 25 Ton) 

ELECTRIC

BLOWER ACCESS
(Location Of
Optional VFD)

BLOWER MOTOR ACCESS
(Location Of Optional
VFD Bypass)

All dimensions are in inches.  They are 
subject to change without notice.  Certi-
fied dimensions will be provided upon 
request.