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5.
To service the burners, remove the heat shield on top of
the manifold supports. Inspect the burners and replace
them if required.
6.
Reverse the above procedure to replace the assemblies.
Verify that burners are level and seated at the rear of the
gas orifice.
F
E
D
Item
Description
Heat exchanger tube
A
Burner flame (blue only)
B
Igniter
C
Figure 29: Typical flame
A
LO
HI
D
OFF
D
I
H
G
F
Item
Description
High and low gas adjustment
A
Mate-n-lock connectors
B
Outlet pressure tap
C
Inlet pressure tap
D
Regulator cover screws (reg.
E
adj. beneath these screws)
Figure 30: Typical gas valve
Johnson Controls Ducted Systems
A
B
C
Item
Description
Burner bracket
D
Gas supply pipe
E
Burner
F
B
MV
C
HI
ON
C
OR
C
E
Item
Description
HI terminal (2nd stage)
F
MP terminal (1st stage)
G
C terminal (common)
H
On/off switch
I
Charging the unit
All ZZ units use thermal expansion devices. Charge the unit to
nameplate charge.
Navigation components for the Smart
Equipment™ control board
The following components are needed to access the control
points in the Smart Equipment™ control. Installation and
operation guides are available from your equipment dealer or
distributor.
1.
Local LCD on the unit control board.
2.
Mobile Access Portal (MAP) Gateway (Portable).
• Source 1 P/N S1-JC-MAP1810-OP
3.
MAP Gateway Quick Start Guide P/N 24-10737-16
4.
MAP Gateway Instruction P/N 24-10737-8
For more information on the Smart Equipment™ unit control board
navigation, refer to the Smart Equipment™ Quick Start Guide.
NOTE: For more in-depth sequence of operation of the Smart
Equipment™ control, refer to the Smart Equipment™
Controls Sequence of Operation Overview LIT-
12011950.
5835254-YIM-A-1119
49
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