Table of Contents
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and field service checklist
Table of ConTenTs
Page 1
System Components
Page 2 & 3
Page 4
Page 5
Page 6
Preliminary Circuit Analysis
Page 7
Page 8
SyStem ComponentS
Amplifiers
A1044U
Discharge Temperature Sensors: use with Mixing Tube
Mixing Tubes: used with sensors
© 2008 Maxitrol Company, All Rights Reserved
Series 44 Installation Instructions
A1044U (replaces all A1044L1, suitable re-
placement for A1044 [C,D,E,H]) (includes 0,
10, or 20 second low fire start capability.)
A1044UF (replacement for A1044FL1)
A1044UG (replacement for A1044G[L1])
A1044 (min. 40° to 80° F/ max. 80° to 140° F)
A1044C (min. 20° to 60° F/ max. 80° to 140° F)
A1044D (min. 20° to 60° F/ max. 35° to 75° F)
A1044E (min. 20° to 60° F/ max. 60° to 120° F)
A1044G (min. 40º to 80º F / max. 160º to 210º F)
A1044H (min. 40º to 80º F / max. 100º to 160º F)
note: Amplifier and Discharge Tempera-
ture Sensor must have same temperature
range to be compatible.
Sensors compatible with A1044U:
TS144 (min. 40° to 80° F/max. 80° to 140° F)
TS144C (min. 20° to 60° F/max. 80° to 140° F)
TS144D (min. 20° to 60° F/max. 35° to 75° F)
TS144E (min. 20° to 60° F/max. 60° to 120° F)
TS144H (min. 40º to 80º F / max. 100º to 160º F)
Sensors compatible with A1044UF:
TS144F (min. 40º to 80º F / max. 60º to 95º F)
Sensors compatible with A1044UG:
TS144G (min. 40º to 80º F / max. 160º to 210º F)
MT1-9 or MT2-9 (9" length)
MT1-12 or MT2-12 (12" length)
MT1-23 or MT2-23 (23" length)
MT1-28 or MT2-28 (28" length)
MT1-57 (57" length)
Valves
Selectrastat (Senses and Selects)
Space temperature Selector
Space temperature Sensor
1
M411 (3/8" & 1/2" pipe size)
M511 (1/2" & 3/4" pipe size)
M611 (3/4" & 1" pipe size)
MR212D (1", 1¼", 1½ pipe size)
MR212E (1½" & 2" pipe size)
MR212G (2½" & 3" pipe size)
MR212J (4" flanged)
MR212D-2, E-2, G-2 & J-2 (same pipe
sizes as MR212D-J except used for 2-
speed blower or dual fuel operation)
note: M (Modulator) valve requires an
upstream pressure regulator for low fire &
high fire settings. MR (Modulator/Regula-
tor) valve requires no upstream pressure
regulator up to 5 psi inlet.
T244 (55° to 90° F)
T244A (40° to 80° F)
or optional pair to replace
Selectrastat
TD244 (wall mount 55° to 90° F)
TD244A (wall mount 40° to 80° F)
TD244P (panel mount 55° to 90° F)
TD244AP (panel mount 40° to 80° F)
TS244 (55° to 90° F)
TS244A (40° to 80° F)
note: Space Temperature
Selector and Space Tem-
perature Sensor must have
same temperature range to be
compatible.
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Table of Contents
Related Manuals for Maxitrol Selectra
Summary of Contents for Maxitrol Selectra
- Page 1 TS144G (min. 40º to 80º F / max. 160º to 210º F) Mixing Tubes: used with sensors MT1-9 or MT2-9 (9” length) MT1-12 or MT2-12 (12” length) MT1-23 or MT2-23 (23” length) MT1-28 or MT2-28 (28” length) MT1-57 (57” length) © 2008 Maxitrol Company, All Rights Reserved...
- Page 2 IntroduCtIon and dImenSIonS Selectra SERIES 44 electronic gas flame modulation systems are A discharge air temperature sensor (and mixing tube) is a means designed primarily for space heating, as components of direct fired of limiting the minimum and maximum discharge air temperature.
- Page 3 Selectrastat, temperature Selector, Space temperature Sensor (Space Temperature Selector dimensions same) (Space Temperature Selector dimensions same except without front dial) Mixing Tube (TS144 attaches internally) © 2008 Maxitrol Company, All Rights Reserved...
- Page 4 SpeCIfICatIonS noTe: Transformer secondary must not be grounded in any Pressure Adjustment Ranges: (Maximum Fire) portion of the circuit external to a Maxitrol amplifier. If exist- ing transformer is grounded, a separate isolated transformer Standard (MR212) 2” to 5” w.c. / 5 to 12 mbar must be used.
- Page 6 M or MR valves and connecting wiring. Figure 1. (Terminal locations shown for A1044 [C, D, E] model amplifiers. For A1044u[F,G] models, terminal blocks 1-5 and 6-9 are at opposite ends of the board.) © 2008 Maxitrol Company, All Rights Reserved...
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Page 7: Wiring Diagrams
VALVE: Green Sensitivity Adjustment POWER: Red “POWER” lights when 24 VAC is applied to terminals 7 & 8. “VALVE” lights when output from terminals 5 & 6 is approximately 2 VDC or greater. © 2008 Maxitrol Company, All Rights Reserved... -
Page 8: Temperature Calibration
A1044U (cover removed) minimum flow rate.) 3. Replace cap (A), and reconnect wire to amplifier terminal #8. VALVE: Green POWER: Red a1044 www.maxitrol.com Maxitrol Company ©2008 Maxitrol Company 23555 Telegraph Rd., PO Box 2230 All Rights Reserved Southfield, MI 48037-2230 SEL14u_MI_EN_04.2008...