Raypak TempTracker B-21 Leaflet

Catalog No.:  5100.30A 

Effective:  2-1-08 

Replaces:  8-1-07

 

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TempTracker is designed to sequence 
multiple boilers up to four total stages, 
whether it’s one to four on/off boilers, two 
two-stage boilers, or one boiler with up to 
four stages. It is available factory-mounted or 
loose on Hi Delta boilers, and loose on 
Raytherm boilers. This control can be used 
for space heating and hot water supply with 
six application-specific modes to meet 
various applications, including outdoor reset 
for heating systems. It monitors and displays 
inlet and outlet temperatures on all 
applications as well as monitors outdoor 
temperature when an outdoor reset mode is 
utilized.  

Features 
• 1-4 

boilers/stages 

•  Selectable P or PID logic 

• LCD 

display 

•  NEMA 1 enclosure 

•  Boiler-in and boiler-out water sensors 

• System 

water 

sensor 

•  Outdoor air sensor  

(Models B-27 and B-23) 

•  Alarm ready (pilot duty) 

•  24 VAC, 60 Hz, 3 VA Supply Power 

• Relay 

Ratings 

Stage 1: 5A @ 120 VAC 
Stages 2 to 4: 3A @ 120 VAC 

 

Programmable Functions 
•  6 programming modes 

•  Adjustable outdoor reset 
•  Min. system water temperature (70 °F) 

•  Max. system water temperature 

o

  Heating – 220 

°F  

o

  DHW – 190 

°F 

•  Temperature differential (2 to 42 °F) 

•  Boiler target (70 to 220 °F) 
•  Outdoor cutoff (35 to 85 °F) 

•  Boiler mass (low, med, high) 

•  Stage-on delay (P mode)  

(10 sec. to 8 min.)    

•  System pump-off delay (0 to 20 min.) 

•  Temperature measurement (°F or °C) 
 
Model Information 

 B-26  2-stage setpoint 
  B-27  2-stage outdoor reset 
 B-21  4-stage setpoint 
  B-23  4-stage outdoor reset 

 

For Hi Delta

®

 and Raytherm

®

Boilers &

 

Water Heaters

Raypak, Inc.  

ƒ  2151 Eastman Avenue, Oxnard, CA  93030  ƒ  (805) 278-5300  ƒ  Fax (800) 872-9725  ƒ  www.raypak.com