S
ERIES
2000 I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
70
FIGURE 34: MR 212 Valve
T
N
E
V
R
2A0
4
1
12A06
R
Low Fire Adjustment
(loosen locking screw
before adjustment)
High Fire Adjustment Cap
Modulator
TOP VIEW (cover removed)
Inlet Pressure
Outlet Pressure
Tap
Tap
(Burner Pressure)
SIDE VIEW
NOTE:
For high fire adj
u
stment, t
u
rn clock
w
ise to
increase manifold press
u
re; t
u
rn co
u
nter clock
w
ise to
decrease manifold press
u
re.
