safgard 550 Series User manual

HOT WATER BOILERS: Prob must b install d at or
abov th minimum saf wat r l v l stablish d by th
boil r manufactur r. Th prob may b install d dir ctly
in th boil r (A) if a suitabl tapping is availabl , in th
ris r (B), in th h ad r horizontally (C), or in th h ad r
v rtically (D). IMPORTANT: To assur prop r drainag ,
pip diam t r should b no l ss than 1" on installations
in v rtical piping and no l ss than 11⁄4" on installations in
horizontal piping.
WARNING: To pr v nt l ctrical shock or quipm nt damag , pow r must b off during installation or s rvicing of th control. To pr v nt
s rious burns, th boil r should b thoroughly cool d b for installing or s rvicing control. Only qualifi d p rsonn l may install or s rvic
th control in accordanc with local cod s and ordinanc s. R ad instructions compl t ly b for proc ding.
Loos n th two control box cov r bind-
ing h ad scr ws and r mov th cov r.
Slid k yhol slots ov r prob mounting
scr ws and tight n scr ws (with ith r a
1/4" h x h ad driv r or flat scr wdriv r.
Conn ct th ring t rminal wir l ad to th prob t rminal
stud and s cur with th lock wash r and wing nut provid d.
With the power removed, proc d with installation and
wiring according to M thod A or B d scrib d on n xt pag .
STEAM BOILERS (Secondary) : Control must b install d in a suitabl tapping provid d in
th boil r(A), or in an qualizing lin (B). Th control should b locat d b low th l v l of th
primary low wat r cut-off but abov th low st p rmissabl wat r lin as sp cifi d by th
boil r manufactur r.
Note: For installations in qualizing lin s, Hydrol v l r comm nds th us of Safgard T s
(s st p 2).
Low Water C t-Offs
550 / 650 / 750 Series
120 VAC Operating V ltage
Automatically shuts off burn r in a low wat r condition to pr v nt
boil r damag .
Low maint nanc . No moving parts to w ar stick or hang up, as in
float d vic s.
T st button (550 & 650 S ri s) allows th burn r circuit and
control to b t st d without low ring th wat r l v l.
Manual r s t f atur (550 & 750 S ri s) will not lock out in pow r
failur s.
1. Where To Install
4. Control Mo nting
MINIMUM
WATER LEVEL HOT WATER
BOILER
A
BC
D
SECONDARY
LWCO
SECONDARY
LWCO
LOW WATER
CUT-OFF PUMP
CONTROLLER
LOW WATER
CUT-OFF PUMP
CONTROLLER
TYPICAL STEAM BOILER
INSTALLATIONS
HOT WATER BOILER
INSTALLATIONS
AB
TEE MOUNTING: If a fi ld fabricat d t is us d, mak sur that th t drains thor-
oughly wh n th wat r l v l falls b low it, and that it conforms to th spacing r quir -
m nts d scrib d in St p 3. Mod ls quipp d with th short r EL1214-SV prob can b
install d in most standard r ducing t s. Safgard cast iron t s ar also availabl to
accommodat all prob mod ls (S pag 4).
2. Tee Options 3. Probe Installation
STANDARD
REDUCING TEE
(SV Models Only) FOEM-TEE
(160psi) 1214C-2 TEE (250psi)
FABRICATED TEE
Apply pip s aling compound to
thr ads b for installing prob .
T flon tap is not r comm nd d.
Ch ck to insur 1/4" cl aranc from
prob to any surfac or t .
CAUTION: Th prob tip
must xt nd fully into th
boil r or pip run. If th
prob is r c ss d, s di-
m nt can build up and
pr v nt th low wat r cut-
off from op rating.

䊴A1 Conn ct th hot l ad of th input volt-
ag (120 VAC, 60 HZ) to t rminal 1. Conn ct th
n utral l ad to t rminal 2. 120 VAC, 60 HZ must
b suppli d to t rminals 1 and 2 for int rnal
op ration of th control.
Install a jump r b tw n t rminal A2 䊳
1 and t rminal P1. Pow r from t rminal P1 is
suppli d to t rminal P2 through th control
r lay wh n wat r is at th prob .
P1 P2 A
+0
LIMIT
CONTROLS
BURNER
CIRCUIT
NEUTRAL
HOT
2
1
ALARM
P1 P2 A
HOT
BURNER
CIRCUIT
NEUTRAL
2 1
BURNER
POWER
SOURCE
( 24 or
120V AC )
P1 P2 A
BURNER
POWER
SOURCE
120V AC
2 1
2P1 P2 A
BURNER
POWER
SOURCE
120V AC
1
NEUTRAL
HOT
P1 P2 A
NEUTRAL
HOT
BURNER
+0
LIMIT
CONTROLS
2 1
2P1 P2 A
120V AC
1
NEUTRAL
HOT
P1 P2 A
+0
LIMIT
CONTROLS
BURNER
CIRCUIT
HOT
NEUTRAL
2
1
1P1 P2 A
ALARM
WIRING METHOD A: SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
䊴B1 Conn ct th hot l ad of th input
voltag (120 VAC, 60 HZ) to t rminal 1. Conn ct
th n utral l ad to t rminal 2. 120 VAC, 60 HZ
must b suppli d to t rminals 1 and 2 for int r-
nal op ration of th control.
Conn ct hot l ad from th 24 VAC
or 120 VAC burn r pow r sourc to
t rminal P1. This t rminal suppli s pow r to t r-
minal P2 in normal op rating conditions wh n
wat r is at th prob . Conn ct n utral to burn r
circuit. Not : consult boil r manufactur r
instructions for prop r t rminal conn ctions.
䊴A3 Conn ct t rminal 2 to burn r circuit
n utral. Conn ct t rminal P2 to burn r circuit in
sri s with oth r limit controls. Consult boil r
manufactur r instructions for prop r t rminal
conn ctions. Control should b wir d in s ri s
with and b for oth r circuits.
Optional alarm conn ction. A4 䊳
Conn ct alarm common to t rminal 2.
Conn ct alarm hot to t rminal A.
Upon completion o wiring, replace control
box cover.
䊴B3 Conn ct t rminal P2 to burn r
circuit in s ri s with and b for oth r limit con-
trols.
Optional alarm conn ction. Conn ctB4䊳
alarm hot to t rminal A. Conn ct alarm common
to n utral of th burn r pow r sourc .
Upon completion o wiring, replace control
box cover.
A1 A2
A3 A4
B1
B3
B2
B4
WIRING METHOD B: SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
B2 䊳

WIRING METHOD C: SECONDARY CUT-OFF
SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT
ALTERNATE WIRING: SECONDARY CUT-OFF WITH CRITICAL DIFFERENTIAL
SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT
OPERATING INSTRUCTIONS
750 Series: Manual Reset
1. With th wat r l v l abov th prob , turn on th pow r and s t th th rmostat to call for
h at. Th burn r will fir imm diat ly. Th LED lamps should b off.
2. Slowly low r th wat r l v l b low th prob . Th amb r light will com on and th burn r
will shut down within two s conds.
3. Wait 3O seconds. Th r d LED lamp will com on indicating that th control is lock d-out.
4. Rais th wat r abov th prob . Th r d LED lamp will r main lit and th burn r will
not fir .
5. Push th RESET button to r s t th control and r stor burn r op ration.
650 Series: Automatic Reset & Test Button
1. With th wat r l v l abov th prob , turn on th pow r and s t th th rmostat to call for
h at. Th burn r will fir imm diat ly. Th LED lamp should b off.
2. Push th t st button on th top of th control to simulat a low wat r condition. Th LED
lamp will light and th burn r will shut down within two s conds.
550 Series: Manual Reset & Test Button
Follow th op rating instructions for th 750 & 650 S ri s abov .
Note: To t st th manual r s t f atur on th 550 S ri s without low ring th wat r l v l:
1. Push and hold down th TEST button. Th r d LED lamp will com on in approximat ly
3O seconds indicating that th control is lock d-out.
2. Onc th r d LED is lit, r l as th TEST button. Th burn r will not fir .
3. Push th RESET button to r s t th control and r stor burn r op ration.
TROUBLE SHOOTING
IF THE BURNER DOES NOT SHUT DOWN
If th burn r do s not shut down wh n th wat r drops
b low th prob :
1. R mov pow r imm diat ly and r -ch ck wiring.
2. R mov pow r and ch ck for ad quat cl aranc from
th prob to any surfac within th boil r or t .
IF THE BURNER DOES NOT FIRE
1. Mak sur wat r is at prob and prob l ad wir is
prop rly s cur d to th t rminal.
2. Ch ck for prop r ground b tw n prob and boil r
sh ll. Exc ssiv us of T flon tap or s aling com-
pound may insulat th prob from th boil r sh ll.
3. R -ch ck wiring and t st for corr ct incoming voltag .
IF THE RED LED LAMP IS ON
Th r d LED lamp indicat s that th control is lock d-out.
This f atur will activat if th boil r xp ri nc s a low
wat r condition xc ding 30 s conds in duration.
IMPORTANT: Do not r s t control until th caus of th
low wat r condition is corr ct d. CAUTION: Do not add
water until boiler is cool.
MAINTENANCE
To nsur optimum p rformanc , insp ct prob annually.
Cl an any scal or build-up from th prob using a scour-
ing pad or st l wool. R -install th prob and t st control
in accordanc with th Op rating Instructions.
Wh n a Safgard 550/750 is us d as a s condary low wat r cut-off on a st am boil r, th following wiring instructions should b us d. Th diagram b low
d picts th 550/750 as a s condary control wir d in s ri s with a Safgard Mod l 450/CG450. Consult boil r manufactur r’s instructions for th location of a
tapping r comm nd d for a s condary low wat r cut-off. CAUTION – Mod l 550/750 should not b us d as a primary cut-off on a st am boil r.
On som installations it may b n c ssary to mount th s condary cut-off at a
l v l in clos proximity to th primary cut-off l v l. In th s situations, wh n
th primary low wat r cut-off shuts down th boil r, th wat r lin can s ttl
b low th s condary cut-off causing nuisanc lockouts. Th wiring diagram at
th right is d sign d to pr v nt th s lockouts. NOTE: This wiring m thod can
only b us d if th pow r supply from th primary cut-off is 120 VAC.
21P1P2 A 21P1P2 A
1 20VAC
+0
BURNER
CIRCUIT
LIMIT CONTROLS
MODEL 450/CG450 MODEL 550/750
ALARM
PRIMARY CUTOFF SECONDARY CUTOFF
FEEDER
NEUTRAL
HOT
21P1 P2 A 21P1 P2 A
NEUTRAL
HOT
MODEL 550/750
PRIMARY CUTOFF SECONDARY CUTOFF
NEUTRAL
BURNER
CIRCUIT
TO
BURNER
POWER FROM
PRIMARY CUT-OFF
120 VAC
+0
LIMIT CONTROLS
MODEL 450/CG450
21
P1 P2 A 21 P1 P2 A
BURNER
SUPPLY
VOLTAGE +0
LIMIT CONTROLS
MODEL 450/CG450 MODEL 550/750
BURNER
CIRCUIT
120VAC
ALARM
PRIMARY CUTOFF SECONDARY CUTOFF
FEEDER
NEUTRAL
HOT
HOT
NEUTRAL

MAXIMUM PRESSURE: 250 PSI
INPUT VOLTAGE: 120 VAC, 60 HZ
SWITCH RATINGS: 5.8 FLA, 34.8 LRA
SWITCH CONTACTS: SPDT
ALARM CIRCUIT: 125 VA @ 120 VAC
Pilot Duty
DIMENSIONS SPECIFICATIONS
LIMITED MANUFACTURER’S WARRANTY
W warrant products manufactur d by
Hydrol v l Company to b fr from d f cts in
mat rial and workmanship for a p riod of two
y ars from th dat of manufactur or on y ar
from th dat of installation, which v r occurs
first. In th v nt of any claim und r this warran-
ty or oth rwis with r sp ct to our products
which is mad within such p riod, w will, at our
option, r pair or r plac such products or r fund
th purchas pric paid to us by you for such
products. In no v nt shall Hydrol v l Company
b liabl for any oth r loss or damag , wh th r
dir ct, indir ct, incid ntal or cons qu ntial. This
warranty is your EXCLUSIVE r m dy and shall b
IN PLACE OF any oth r warranty or guarant ,
xpr ss or impli d, including, without limitation,
any warranty of MERCHANTABILITY or fitn ss
for a particular purpos . This warranty may not
b assign d or transf rr d and any unauthoriz d
transf r or assignm nt th r of shall b void and
of no forc or ff ct.
26 Bailey Road
North Haven, CT 06473
Phone: [phone]
FAX: [phone]
www.hydrolevel.com
59 /16
11 /16
51 /2
31 /16
BACK
37 /8
15 /8
11 /8
15 /8
23 /8
BOTTOM
FITTINGS
Controls quipp d with th EL1214-SV Prob can b mount d in standard r ducing t s (suppli d by oth rs). Safgard manifolds, list d b low, can b us d
with all prob mod ls.
MODEL PSI SIZE
FOEM-1 160 1 1/2" x 1 1/2" x 3/4"NPT
FOEM-2 160 1" x 1" x 3/4"NPT
FOEM-3 160 1 1/4" x 1 1/4" x 3/4"NPT
1214C-2 TEE 250 1" x 1" x 3/4"NPT
FOEM MANIFOLD
2 4C-2 TEE
021218
MAINTENANCE: R mov and insp ct prob annually. Cl an any scal or build-up from th prob using a scouring pad or st l wool. R -install th prob and
t st th control op ration in accordanc with th Op rating Instructions. If th prob is install d in an qualizing lin of a st am boil r, th qualizing lin
should b blown down w kly.
T st Pr ssur : 1000 PSI, All Mod ls
PROBE DATA
2"
SQUARE
17 /8"
313/16"
15/16"
1"
3/4" NPT
5/16"
2"
SQUARE
11 /16"
3"
15/16"
1"
3/4" NPT
5/16"
2"
SQUARE
17 /8"
49/16"
1"
3/4" NPT
5/16"
111/16"
EL1214 – STANDARD MODEL – 3/4" NPT
For 1/2", ord r Mod l EL1220
EL1214-SV – 3/4" NPT
For 1/2", ord r No. EL1220-SV
EL1214-P – 3/4" NPT