INSTALLATION DATA
720 SERIES
DUAL VALVE GAS HEATING CONTROLS
The Robertshaw® 720 Series Gas Controls are designed for a wide
ǀĂƌŝĞƚLJŽĨŚĞĂƟŶŐĂƉƉůŝĐĂƟŽŶƐĂŶĚĐĂŶďĞƵƐĞĚƚŽƌĞƉůĂĐĞŵŽƐƚĚƵĂů
;ƐŝdžĨƵŶĐƟŽŶͿǀĂůǀĞƐ͘dŚĞLJĂƌĞĂǀĂŝůĂďůĞŽŶůLJŝŶĂϮϰǀŽůƚŵŽĚĞůƵƐĞĚ
ǁŝƚŚĂĐŽŶƐƚĂŶƚƉŝůŽƚ͘DŽĚĞůƐĂƌĞĂǀĂŝůĂďůĞǁŝƚŚĂŶĚǁŝƚŚŽƵƚĂƉƌĞƐƐƵƌĞ
ƌĞŐƵůĂƚŽƌ͘hŶŝͲ<ŝƚƐΠĂƌĞĨĂĐƚŽƌLJƐĞƚĂƚϯ͘ϱ͟t͘͘ĨŽƌŶĂƚƵƌĂůŐĂƐ͕ďƵƚĐĂŶ
ďĞĐŽŶǀĞƌƚĞĚƚŽ>͘W͘ďLJŝŶƐƚĂůůŝŶŐƚŚĞƌĞŐƵůĂƚŽƌĐŽŶǀĞƌƐŝŽŶŬŝƚŝŶĐůƵĚĞĚ͘
;^ĞĞZĞŐƵůĂƚŽƌŽŶǀĞƌƐŝŽŶƐĞĐƟŽŶ͘Ϳ
dŚĞϳϮϬ^ĞƌŝĞƐ͕ƵƐĞĚǁŝƚŚĂĐŽŶƐƚĂŶƚƉŝůŽƚ͕ŝƐĂƐŝdžĨƵŶĐƟŽŶǀĂůǀĞ
ŝŶĐŽƌƉŽƌĂƟŶŐĂŵĂŶƵĂůǀĂůǀĞ͕ƐĂĨĞƚLJƐŚƵƚŽīŵĂŐŶĞƚ͕ĚƵĂůĂƵƚŽŵĂƟĐ
ǀĂůǀĞƐ;ŚĞŶĐĞƚŚĞƚĞƌŵ͞ĚƵĂůǀĂůǀĞƐ͟Ϳ͕ŵĂŝŶŐĂƐƌĞŐƵůĂƚŽƌ͕ĂŶĚƉŝůŽƚ
ĂĚũƵƐƚŵĞŶƚ͘/ƚĨĞĂƚƵƌĞƐĂŶŝŶƚĞŐƌĂůŵĂŶƵĂůƐĞůĞĐƚŽƌƵƐĞĚƚŽƐĞůĞĐƚĨƌŽŵ
ĨŽƵƌŐĂƐŇŽǁƉŽƐŝƟŽŶƐͲŽī͕ŽŶ͕ƉŝůŽƚĂŶĚ͞ƐĞƚ͘͟dŚĞ͞ƐĞƚ͟ƉŽƐŝƟŽŶ
ƉƌŽǀŝĚĞƐƉŝůŽƚŽŶůLJŐĂƐŇŽǁĚƵƌŝŶŐŵĂŐŶĞƚĞŶĞƌŐŝnjŝŶŐĂŶĚůŽĐŬƵƉ͘
ƵŝůƚͲŝŶƐƚŽƉƐƐĞƌǀĞƚŽƉƌĞǀĞŶƚĂĐĐŝĚĞŶƚĂůƐĞƫŶŐƚŽƚŚĞ͞Žī͟ƉŽƐŝƟŽŶ͘
tŝƌŝŶŐĐŽŶŶĞĐƟŽŶƐ͕ŵĂŶƵĂůƐĞůĞĐƚŽƌĂŶĚĂĚũƵƐƚŵĞŶƚƐĂƌĞĞĂƐŝůLJ
ĂĐĐĞƐƐŝďůĞŽŶƚŚĞƚŽƉŽĨƚŚĞǀĂůǀĞ͘tŝƚŚĂϯͲϵͬϭϲ͟ƐǁŝŶŐƌĂĚŝƵƐ͕ƚŚĞϳϮϬ
^ĞƌŝĞƐůĞŶĚƐŝƚƐĞůĨǁĞůůƚŽƌĞƉůĂĐŝŶŐŵĂŶLJKDǀĂůǀĞƐ͘ŽŶƚƌŽůƐĂƌĞ
ŵƵůƟƉŽƐŝƟŽŶĂŶĚĐĂŶďĞŵŽƵŶƚĞĚŝŶĂŶLJƉŽƐŝƟŽŶ;ĞdžĐĞƉƚƵƉƐŝĚĞĚŽǁŶͿ͘
dŽƉƌĞǀĞŶƚƵŶƐĂĨĞĂƩĞŵƉƚƐĂƚƌĞƉĂŝƌ͕ƐƉĞĐŝĂůƐĐƌĞǁƐĂƌĞƵƐĞĚĂŶĚ
ƌĞƉůĂĐĞŵĞŶƚƉĂƌƚƐĂƌĞEKdĂǀĂŝůĂďůĞ͘
SPECIFICATIONS
ůĞĐƚƌŝĐĂůZĂƟŶŐƐ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ Ϯϰs͕͘ϱĂŵƉƐ
WƌĞƐƐƵƌĞZĞŐƵůĂƚŽƌ
EĂƚƵƌĂů'ĂƐ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ĨĂĐƚŽƌLJƐĞƚĂƚϯ͘ϱ͟t͘͘
>͘W͘'ĂƐ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ĨĂĐƚŽƌLJƐĞƚĂƚϭϭ͘Ϭ͟t͘͘
WŝůŽƚKƵƚůĞƚ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ϭͬϰ͟ƚƵďŝŶŐ
ŵďŝĞŶƚdĞŵƉĞƌĂƚƵƌĞ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͲϰϬΣƚŽϭϳϱΣ&
DĂdžŝŵƵŵ/ŶůĞƚWƌĞƐƐƵƌĞ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ͘ ϳ͟t͘͘ͲŶĂƚƵƌĂůŐĂƐ
REGULATION CAPACITIES (BTU’S)
SIZE
TYPE GAS
NATURAL
L.P.
MIN.
MAX.
MIN.
MAX.
ϯͬϴ͟džϯͬϴ͟
ϭϱ͕ϬϬϬ
ϭϳϱ͕ϬϬϬ
ϭϱ͕ϬϬϬ
ϮϴϬ͕ϬϬϬ
ϭͬϮ͟džϯͬϴ͟
ϭϱ͕ϬϬϬ
ϭϳϱ͕ϬϬϬ
ϭϱ͕ϬϬϬ
ϮϴϬ͕ϬϬϬ
ϭͬϮ͟džϭͬϮ͟
ϭϱ͕ϬϬϬ
ϮϬϬ͕ϬϬϬ
ϭϱ͕ϬϬϬ
ϯϬϬ͕ϬϬϬ
ϭͬϮ͟džϯͬϰ͟
ϭϱ͕ϬϬϬ
ϮϬϬ͕ϬϬϬ
ϭϱ͕ϬϬϬ
ϯϬϬ͕ϬϬϬ
ϯͬϰ͟džϯͬϰ͟
ϭϱ͕ϬϬϬ
ϮϬϬ͕ϬϬϬ
ϭϱ͕ϬϬϬ
ϯϬϬ͕ϬϬϬ
PIPING
ϭ͘ŚĞĐŬƌĞƉůĂĐĞŵĞŶƚǀĂůǀĞĨŽƌŵƵůƟƉůĞŽƵƚůĞƚƐ;ƐŝĚĞŽƵƚůĞƚƐͿ͘/ĨŝƚŚĂƐ
ƚŚĞŵ͕ďĞƐƵƌĞĂůůƵŶƵƐĞĚŽƵƚůĞƚƐĂƌĞƉůƵŐŐĞĚƵƐŝŶŐƚŚĞƐŽĐŬĞƚƉůƵŐƐ
ƉƌŽǀŝĚĞĚ͘
Ϯ͘WŝƉĞŽƌƚƵďŝŶŐŵƵƐƚďĞĐůĞĂŶĂŶĚĨƌĞĞŽĨƐĐĂůĞĂŶĚĚŝƌƚ͘
ϯ͘DĂŬĞƐƵƌĞŐĂƐƉŝƉŝŶŐŝƐƉƌĞƐƐƵƌĞƚĞƐƚĞĚďĞĨŽƌĞĐŽŶƚƌŽůŝƐĐŽŶŶĞĐƚĞĚ͘
,ŝŐŚƉƌĞƐƐƵƌĞĐĂŶĚĂŵĂŐĞĐŽŶƚƌŽůĐĂƵƐŝŶŐĂŚĂnjĂƌĚŽƵƐĐŽŶĚŝƟŽŶ͘Ž
ŶŽƚƐƵďũĞĐƚĐŽŶƚƌŽůƚŽŵŽƌĞƚŚĂŶϭͬϮW^/͕;ϭϰ͟t͘͘ͿŝŶůĞƚƉƌĞƐƐƵƌĞ͘
ϰ͘/ĨŝƚŝƐŶŽƚĂůƌĞĂĚLJŝŶƐƚĂůůĞĚ͕ĂĚƌŝƉůĞŐ;ƐĞĚŝŵĞŶƚƚƌĂƉͿŵƵƐƚďĞ
ĂĚĚĞĚƚŽƚŚĞŐĂƐƐƵƉƉůLJůŝŶĞƚŽƚŚĞĐŽŶƚƌŽů͘;^ĞĞĮŐƵƌĞƚŽƚŚĞƌŝŐŚƚͿ͘
ůůƉŝƉŝŶŐŵƵƐƚĐŽŵƉůLJǁŝƚŚůŽĐĂůĐŽĚĞƐĂŶĚŽƌĚŝŶĂŶĐĞƐĂŶĚǁŝƚŚ
EĂƟŽŶĂů&ƵĞů'ĂƐŽĚĞ;E^/ϮϮϯ͘ϭͬE&W͕EŽ͘ϱϰͿ͘
INSTALLATION INSTRUCTIONS
Turn off gas supply and electrical power to equipment
before servicing.
CAUTION
d,/^s/^,Kh>/E^d>>zYh>/&/
d,E//Et/d,hZ'Z&KZ^&dz^/DWZKWZ
/E^d>>d/KEKh>Z^h>d/E,ZKh^KE/d/KE͘
ϱ͘hƐŝŶŐƉŝƉĞƚŚƌĞĂĚĐŽŵƉŽƵŶĚƐƵŝƚĂďůĞĨŽƌƚŚĞŐĂƐďĞŝŶŐƵƐĞĚ͕ĂƉƉůLJĂ
ƐŵĂůůĂŵŽƵŶƚŽŶƚŚĞŵĂůĞƉŝƉĞƚŚƌĞĂĚƐ͘;ŽŶŽƚƵƐĞdĞŇŽŶƚĂƉĞŽƌ
dĞŇŽŶĐŽŵƉŽƵŶĚ͘Ϳ>ĞĂǀĞƚŚĞĮƌƐƚƚǁŽƚŚƌĞĂĚƐĐůĞĂŶ͘EĞǀĞƌƵƐĞ
ĐŽŵƉŽƵŶĚŽŶĨĞŵĂůĞƚŚƌĞĂĚƐĂƐŝƚŵŝŐŚƚďĞƉƵƐŚĞĚŝŶƚŽƚŚĞĐŽŶƚƌŽů
ďŽĚLJ͘
ϲ͘dŚĞŐĂƐǀĂůǀĞŝƐŵƵůƟƉŽƐŝƟŽŶĂŶĚĐĂŶďĞŵŽƵŶƚĞĚŝŶĂŶLJƉŽƐŝƟŽŶ
;ĞdžĐĞƉƚƵƉƐŝĚĞĚŽǁŶͿǁŝƚŚŽƵƚĂīĞĐƟŶŐŝƚƐŽƉĞƌĂƟŽŶ͘
ϳ͘/ŶƐƚĂůůŐĂƐǀĂůǀĞƐŽŐĂƐŇŽǁĐŽŶĨŽƌŵƐǁŝƚŚƚŚĞŝŶůĞƚĂŶĚŽƵƚůĞƚŽĨ
ƚŚĞĐŽŶƚƌŽů͘
ϴ͘
DO NOT
ŝŶƐĞƌƚĂŶLJŽďũĞĐƚŽƚŚĞƌƚŚĂŶƐƵŝƚĂďůĞƉŝƉĞŽƌƚƵďŝŶŐŝŶƚŚĞ
ŝŶůĞƚŽƌŽƵƚůĞƚŽĨƚŚŝƐĐŽŶƚƌŽů͘/ŶƚĞƌŶĂůĚĂŵĂŐĞŵĂLJŽĐĐƵƌĂŶĚƌĞƐƵůƚ
ŝŶĂŚĂnjĂƌĚŽƵƐĐŽŶĚŝƟŽŶ͘ďĂĐŬƵƉǁƌĞŶĐŚƐŚŽƵůĚŽŶůLJďĞƵƐĞĚŽŶ
ƚŚĞǁƌĞŶĐŚďŽƐƐƉƌŽǀŝĚĞĚĨŽƌƚŚŝƐƉƵƌƉŽƐĞ;ƐĞĞĚƌĂǁŝŶŐͿ͕ŶĞǀĞƌŽŶ
ďŽĚLJŽĨƚŚĞĐŽŶƚƌŽů͕ĂƐƚŚŝƐĐŽƵůĚĚŝƐƚŽƌƚƚŚĞĐĂƐƟŶŐ͘
NOTE:
ŽŶŽƚ
ŽǀĞƌƟŐŚƚĞŶĂŶLJƉŝƉĞĐŽŶŶĞĐƟŽŶƐ͕ĂƐƚŚŝƐĐŽƵůĚĐƌĂĐŬƚŚĞǀĂůǀĞďŽĚLJ͘
ǀĂůǀĞǁŝƚŚĂĐƌĂĐŬĞĚǀĂůǀĞďŽĚLJǁŝůůŶŽƚďĞǁĂƌƌĂŶƟĞĚ͘
