Reznor YDSA Unit Installation Manual - Manual (Page 43)

Form I-Y, P/N 273646R6, Page 43
NOTE: The manifolds
illustrated are for standard
efficiency, non-condensing
heat sections. Follow the
same steps for measuring
manifold pressure on high
efficiency, condensing heat
sections.
Optional High Gas
Pressure Switch
Ignitor
Venter
Assembly
Manifold Pressure Tap
Optional
Low Gas
Pressure
Switch
1-Stg
Valve
Modulating Valve
Venter
Control
Pressure
Switch
Single Heat
Section Manifold
Assembly with
Electronic
Modulation
Option AG73
FIGURE 24A -
Manifolds with
Modulating Control
Option AG73 (5:1,
single heat section)
and Option AG74
(10:1, dual heat
sections)
FIGURE 24B - Adjusting Modulating
Valve -- Gas Control Option AG73
and Option AG74
Power:
2 - Terminal 4 (-)
1 - Terminal 3 (+)
Control Signal:
Terminal 1 (+)
Terminal 2 (-)
Dip Switches
(see table below)
Position Feedback:
Pin 2
Pin 1
LED
Button 2
(decreases gas flow)
Button 1
(increases gas flow)
a) Remove the two screws holding the
cover.
b) Follow the instructions (Steps 4 and 5
shown on page 45); or to set the high
fire or low fire pressure.
c) Replace the cover.
LED Light
High Fire (10V) Solid Red
Low Fire Blinking Red
Operating Mode Off
Dip Switch
Position Table
* YD uses the
2-10v signal.
Control Signal SW1 Signal SW2 Offset SW3 Characteristic
0-10v OFF OFF OFF
* 2-10v * OFF * ON * OFF
0-20mA ON OFF OFF
4-20mA ON ON OFF
Venter
Assembly
Optional High Gas
Pressure Switch
Ignitor Limit
Dual Heat Section
Manifold Assembly
with Electronic
Modulation
Option AG74
Manifold Pressure Tap
Heat Section 2
2-Stg
Valve
Venter
Assembly
Optional
High Gas
Pressure
Switch
Manifold Pressure Tap
Heat Section 1
1-
Stg
Valve
Modulating
Valve
Venter Control
Pressure Switch
Optional
Low Gas
Pressure
Switch
Optional
Low Gas
Pressure
Switch