PEERLESS MI SERIES - Sequence of Operation; Wiring and Connection Diagram

CONNECTION DIAGRAM
24V THERMOSTAT (BY OTHERS)
.... LB148£ C_81NATIO_i DISCONNECT
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NSTALLF_ _ 60 LI BK
R SUPgLY L2 SER_C£
eK_ THESE]_TO--
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I _ERMO¢OUpI "_
L2T22_ ,
I i
CONNECTOR rifle RelJ_e,4JT S_l F _=t__
w V#_lTE
C_NEC1]ON DIAGRAM LEG{.ND 0 ORANCE
BL BLUE
-- UNE VOLTAGE _IZE _¢ A_ TYPE TW, TFF'N OR 1EW/A_ _IRE
-- UNE VOLTAGE _ZE 16-18 AWG TYPE I%V TFFN OR I_W/A_%a V_RE
-- LOW '_LTAGE SIZE 18 A_G TYPE TC CABLE
-- -- LOW VOLTAGE SIZE 16-18 AWG WR[ TYPE TEW/AV_, TFFN _R£
NOTESm
I) ALL _RING MUST COMPLY V_IH APPUANC[ CODES, ORDINANCES AND REGULATIONS
2) IF ANY OF 1HE ORIGINAL MRE AS SUpPU_O _4TH THE ApPLiANCE MUST BE
REPLACED, IT MUST B_ REPLACED V4T_ _RE AS SHO_
LADDER OIAGRAM
115/60/i L2
pOV_ER
SUPPLy
C_ C2
FUSE{) RI
DISCONNECT SER_CE
S_TCH S_4TCH pR_MAR Y
TR ANS_Oei4ER
SZCONDARY
I B2,
I
I PRS BvS
L 1%.
RZ LIMIT I
,
I T_ERNOCOUP_
LAODER DIACRAM I[G_NO I
-- 120v INTERNAL WIRIN_ i
-- 120V EXTERNAL _IRtNG [
24V INI_RNAL _,tRING
-- 24V [XERNAL _IRINg
---- MIU IVOLT _RING
0 L_I4BE _RMtNAL
Figure 17: Wiring and Connection Diagram -Standing Pilot (Continuous Ignition)
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I. Standing Pilot (See Figure 17 above)
a. The vent damper is continuously powered. On a
call for heat, limit relay R is energized, which
energizes:
• the circulator (when used) through contact
R1, and
• the vent damper operator through contact R2,
provided that the high-limit switch is
closed.
The vent damper operator opens the damper.
b. Once the damper is proven open, the gas valve
energizes, provided that all of the following
conditions are met:
• the pilot thermocouple is proving flame
• the blocked vent switch is closed, and
• the flame rollout switch is closed.
Pilot flame is monitored through the pilot
thermocouple. If pilot flame is lost during a call
for heat, main and pilot gas flow will be shut off.
The valve must then be manually reset by
following the Lighting Instructions mounted on
the jacket panel and included in Section 7 of this
manual.
c. When the call for heat ends:
• Limit relay R de-energizes, which opens
contacts RI and R2.
• The circulator shuts down.
• The gas valve de-energizes.
• The vent damper closes.
d. If temperature exceeds limit setting, main burners
shut off and circulator continues to operate.
16