PB Heat PureFire PFC-625 Guide

USER’S INFORMATION MANUAL
PureFire ® GAS BOILERS
PFC-625 and PFC-750
TO THE INSTALLER:This manual is the property of the owner and must be axed near the boiler for
future reference.
TO THE OWNER: This boiler should be inspected annually by a Qualied Service Agency.
TO BE COMPLETED BY THE INSTALLER
Service Agency Phone No.
Address
Boiler Model No. Serial No. Date of Installaon:
PB HEAT, LLC
131 S. CHURCH ST • BALLY, PA 19503
PFC8039 R0 (10/21-2.5C)
Printed in U.S.A.
©2021 PB Heat, LLC. All rights reserved.
Négliger de suivre ces instructions à la lettre pourrait
provoquer un incendie ou une explosion causant
des dégâts matériels, des blessures ou la mort.
– Ne pas ranger ou uliser de la gazoline ou d’autres
liquides ou gaz inammables à proximité de cet
appareil ou d’un autre du même type.
– QUE FAIRE SI VOUS DÉTECTEZ UNE ODEUR
DE GAZ
• Ne pas tenter d’allumer l’appareil.
• Ne toucher à aucun interrupteur électrique ;
n’uliser aucun appareil téléphonique dans
l’immeuble.
• Contacter immédiatement votre fournisseur de
gaz à parr du téléphone d’un voisin. Suivre les
instrucons données par votre fournisseur de
gaz.
• S’il est impossible de rejoindre le fournisseur de
gaz, appeler le service des incendies.
– L’installaon et l’entreen doivent être eectués par
un installateur qualié, une société d’entreen ou le
fournisseur de gaz.
⚠MISE EN GARDE
If the information in this manual is not followed
exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
– Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any other
appliance.
– WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instrucons.
•If you cannot reach your gas supplier, call the
re department.
– Installaon and service must be performed by
a qualied installer, service agency or the gas
supplier.
⚠WARNING

2
Basic Operation
A. General: This appliance is a sealed combuson, condensing water boiler and is equipped with controls for proper
operaon. All controls must be maintained in proper working order. Contact a qualied service agency to provide
annual maintenance as specied in the Installaon, Operaon
and Maintenance Manual.
B. The following diagram shows the safety controls and device locaons on the appliance. If any one of these controls
or devices are acvated, contact a qualied service person immediately. Do not try to correct the problem
without contacting a qualied service person.
1. Primary Safety Control: The primary safety control monitors all limit controls and will prevent the
appliance from operang if a limit has been exceeded. This device also monitors blower speed and
temperature to assure safe operaon of the appliance.
2. High Vent Temperature Limit: This device interrupts appliance operaon if the vent temperature
exceeds the maximum allowable temperature of the vent material. The control display module will display
“Flue Gas Error” if this device is acvated.
3. High Temperature Limit: This device automacally interrupts boiler operaon if the supply water
temperature exceeds 190°degrees Fahrenheit. The primary safety control will not allow the unit to restart
unl the reset buon is depressed on the display module. The control will display ”High Temp Error”
if the device is acvated.
4. Flame Sensor: The ame sensor monitors the ame and communicates with the primary safety control
to interrupt the gas ow to the appliance if no ame is present. The primary safety control will lock out if
the ame sensor malfuncons producing a false ame signal.
5. Safety Relief Valve: This valve protects the boiler from excessive pressure. This device can discharge
a large amount of hot water and should be piped to discharge near the oor and away from contact with
people. The discharge should be piped near a oor drain if possible.
6. Gas Valve: This valve interrupts the gas ow if no power is present from the primary safety control.
7. Vent Pressure/Blocked Condensate Switch: This device automacally interrupts boiler operaon if
there is a blockage in the exhaust vent or condensate drainage line. The control will display “Blocked Drain”
if this device is acvated.
8. Air Proving Switch: This device prevents the boiler’s operaon if there is a blockage in the air inlet piping
or lter.
C. Instrucons for operaon and shung down your boiler are shown on the Operang and Lighng Instrucons Label
posted on the back of the boiler cover. The instrucons are also shown in Figure 3.
D. The sequence of operaon is shown in Figure 4.
Should overheating occur or the gas supply fail to shut o󰀨, do not turn o󰀨 or disconnect the
electrical supply to the pump. Instead, shut o󰀨 the gas supply at a location external to the appliance.
En cas de surchau󰀨e ou si l’alimentation ne se coupe pas, ne pas éteindre manuellement ni couper
l’alimentation électrique de la pompe. Couper plutôt l’alimentation en combustible à l’extérieur
de l’appareil
Do not use this boiler if any part has been under water. Immediately call a qualied service agency
to inspect the boiler and to replace any part of the control system and any gas control which has
been under water.
⚠CAUTION
Service on this boiler should be undertaken only by trained and skilled personnel from a qualied
service agency.
⚠WARNING

3
HIGH TEMPERATURE
LIMIT SUPPLY SENSOR
LWCO
PROBE
Figure 2: High Temperature Limit Location
FLUE SENSOR
TEMPERATURE
SWITCH
RETURN SENSOR
CONDENSATE
FLOAT SWITCH
PRIMARY SAFETY
CONTROL
IGNITOR
BLOCKED VENT
SWITCH
AIR PROVING SWITCH
FLAME SENSOR
GAS VALVES
Figure 1: Control & Safety Device Locations
FLUE SENSOR
TEMPERATURE
SWITCH
RETURN SENSOR
CONDENSATE
FLOAT SWITCH
PRIMARY SAFETY
CONTROL
IGNITOR
BLOCKED VENT
SWITCH
AIR PROVING SWITCH
FLAME SENSOR
GAS VALVES

4
Figure 3: Lighting and Operating Instructions
FOR YOUR SAFETY
READ BEFORE OPERATING
OPERATING INSTRUCTIONS
1. STOP! Read the safety information above.
2. Set the thermostat to lowest setting.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition
device which automatically lights the burner.
Do not try to light the burner by hand.
5. Turn gas shutoff valve(s) clockwise 

to
"OFF". Handle will be perpendicular to pipe,
do not force.
6. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow "B" in the safety
information above on this label. If you don’t smell
gas, go to the next step.
7. Turn gas shutoff valve(s) counterclockwise 

to "ON". Handle will be in line with the pipe.
8. Turn on all electric power to appliance.
9. Set thermostat to desired setting.
10. If the appliance will not operate, follow the
instructions "To Turn Off Gas To Appliance"
and call your service technician or gas supplier.
TO TURN OFF GAS TO APPLIANCE
Gas Control Knob(s)
(shown in the
“OFF” position)
A. This appliance does not have a pilot. It is
equipped with an ignition device which
automatically lights the burner. Do not try to
light the burner by hand.
B. BEFORE OPERATING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU DO SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch;
do not use any phone in your building.


Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.




If you cannot reach your gas supplier,
call the fire department.
C. Use only your hand to turn the gas control
valve. Never use tools. If the handle will not
turn by hand, don’t try to repair it, call a
qualified service technician. Force or
attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualified service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
1. Set the thermostat to lowest setting.
2. Turn off all electric power to the appliance
if service is to be performed.
3. Turn the gas shutoff valve(s) clockwise 

"OFF". Handle will be perpendicular to pipe,
do not force.
9512 REV1
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
(PF)
Single Burner
Models
Two Burner
Models (Commercial)

5
9512F REV1
(PF)
1. ARRÊTEZ! Lisez les consignes de sécurité plus
haut sur cette étiquette.
2. Réglez le thermostat au niveau le plus bas.
3. Coupez toute l’alimentation électrique
de l’appareil.
4. Cet appareil est muni d’un dispositif d’allumage
automatique de brûleur. Ne tentez pas
d’allumer les veilleuses à la main.
5. Tournez les boutons de commande dans le
sens des aiguilles d’une montre 

pour les
mettre en position d’arrêt « OFF ».
6. Attendre cinq (5) minutes pour que tout le gaz
présent puisse s’échapper. Sentir autour de
l’appareil pour détecter toute odeur de gaz,
incluant près du sol. Si vous sentez une odeur
de gaz. ARRÊTEZ! Suivez les consignes de
sécurité apparaissant en « B » plus haut sur
cette étiquette. Si vous ne détectez aucune
odeur de gaz, passez à l’étape suivante.
7. Tournez les boutons de commande dans le
sens contraire des aiguilles d’une montre 

pour le mettre en position de marche « ON ».
8. Remettez en marche toute l’alimentation
électrique de l’appareil.
9. Réglez le thermostat au niveau désiré.
10.Si l’appareil ne se met pas en marche, suivez
les instructions ci-dessous : « Couper
l’alimentation en gaz de l’appareil » et appelez
votre technicien d’entretien ou fournisseur de
gaz.
POUR VOTRE SÉCURITÉ,
LISEZ AVANT L’ALLUMAGE
MISE EN GARDE: Négliger de suivre ces instructions à la lettre pourrait
provoquer un incendie ou une explosion causant des dégâts matériels,
des blessures ou la mort.
A. Cet appareil est muni d’un dispositif d’allumage
automatique du brûleur. Ne tentez pas
d’allumer le brûleur à la main.
B. AVANT DE METTRE EN MARCHE, sentez autour
de l’appareil pour détecter toute odeur de gaz.
Étant donné que certains gaz sont plus lourds
que l’air et se déposent sur le sol, s’assurer de
bien sentir près du plancher.
QUE FAIRE SI VOUS DÉTECTEZ UNE ODEUR
DE GAZ
• Ne pas tenter d’allumer l’appareil
• Ne toucher à aucun interrupteur électrique;
n’utiliser aucun appareil téléphonique dans
l’immeuble.
• Contactez immédiatement votre fournisseur
de gaz à partir du téléphone d’un voisin. Suivre
les instructions données par votre fournisseur
de gaz.
• S’il est impossible de rejoinder le fournisseur
de gaz, appeler le service des incendies.
C. N’utilisez que votre main pour appuyer ou
tourner le bouton de commande du gaz. Ne
jamais utiliser d’outils. S’il est impossible
d’enfoncer ou de tourner le bouton à la main, ne
tentez pas de le réparer. Appelez un technicien
d’entretien qualifié. Une force excessive ou une
tentative de réparation peut provoquer un
incendie ou une explosion.
D. N’ utilisez pas cet appareil ni aucune de ses
pièces si elles ont été immergées. Contactez
immédiatement un technicien d’entretien
qualifié pour inspecter l’appareil et remplacer
toute pièce du système de régulation du débit
gazeux et toute commande de gaz ayant été
immergée.
1. Réglez le thermostat au niveau le plus bas.
2. Si des travaux d’entretien doivent êtreeffectués,
couper toute l’alimentation électrique
de l’appareil.
3. Tournez les boutons de commande dans le
sens des aiguilles d’une montre 

pour les
mettre en position d’arrêt « OFF ».
COUPER L’ALIMENTATION EN GAZ DE L’APPAREIL
DIRECTIVES DE FONCTIONNEMENT
Bouton de Commande
(illustré en Position
d’arrêt «OFF»)
Modèles à un
Seul Brûleur
Modèles à Deux
Brûleurs (du Commerce)
Figure 3a: Lighting and Operating Instructions

6
6
BLOWER
Figure 4: Sequence of Operation

7
User Maintenance
A. General Housekeeping (Continuous)
1. Keep the area around this appliance clear and free of combusble materials and obstrucons.
2. Do not store or use ammable vapors or liquids, such as gasoline, in the vicinity of the boiler. This
applies to any fossil fuel-red appliance.
3. Do not store or use any sources of hydrocarbons in the vicinity of this appliance.
4. Do not store or use any sources of hydrocarbons in the vicinity of the inlet air terminaon. If the source
of hydrocarbon contaminaon cannot be removed, the combuson air must be re-piped to a dierent
locaon.
5. Sources of hydrocarbons include bleaches, detergents, cleaning solvents, chlorinated waxes or cleaners,
chlorine based swimming pool chemicals, rock salt or other chloride based ice melt soluons, water
soener salt, refrigerants, paint or varnish removers, fabric soeners, hydrochloric acid or murac acid,
cements, glues and adhesives.
B. Inspect Venting / Air Inlet System (Monthly)
1. Inspect the vent pipe and assure that it is connuous with no separaons, obstrucons, sags,
discoloraon, depressions or deformaon. Vent pipe must be supported at minimum 4 foot
(122 cm) intervals and secured with adhesive specically formulated for the material used.
2. Air inlet piping must be connuous from the air inlet terminaon to the boiler with no separaons,
obstrucons or sags. Air inlet piping must be supported at minimum 4 foot
(122 cm) intervals and secured with adhesive specically formulated for the material used.
3. Inspect around the vent and air inlet terminaons outside the home for obstrucons. Keep area clear of
snow and debris. Inspect also for any gaps at the wall penetraon(s) which could allow vented gasses to
reenter the home.
4. Nofy a qualied service contractor if any problems are found with the venng or air intake systems and
be sure that the problems are corrected.
C. Inspect Pressure Relief Valve (Monthly)
1. Inspect the pressure relief valve outlet for signs of leakage.
2. Nofy a qualied service contractor immediately if there are signs of leakage. (If the problem persists, it
may be the result of a malfunconing expansion tank or improper system design).
Failure to inspect the venting system and, if problems are found, to notify a qualied service
technician, may result in boiler exhaust entering the structure and causing severe personal
injury or death from carbon monoxide poisoning and oxygen depletion.
⚠WARNING
Service on this boiler should be undertaken only by trained and skilled personnel from
a qualied service agency. Inspections should be performed at intervals specied in the
Installation, Operation and Maintenance Manual and this User’s Information Manual. Maintain
manuals in a legible condition.
Keep boiler area clear and free of combustible materials, gasoline and other ammable vapors
and liquids.
Do not place any obstructions in boiler room that will hinder ow of combustion and ventilation air.
⚠WARNING

8
D. Inspect Condensate Drain System (Monthly)
1. With the boiler in operaon with a call from the thermostat, check that condensate is owing in the
condensate tubing. Check for any blockage or restricon in the condensate drain lines.
2. Check the condensate drain piping for visible water leaks.
3. Check the level of condensate neutralizaon media (where used) in the front condensate collector.
4. Nofy a qualied service contractor immediately if there are signs of leakage, blockage, or depleted
neutralizaon media.
E. Observe Boiler Operation (Monthly)
1. Iniate a call for heat from the system by turning up a room thermostat or draining hot water at a
faucet (if an indirect water heater is used).
2. Observe the boiler start and listen for objeconable noises during the start-up.
3. Contact a qualied service person if objeconable sounds are observed.
F. Control Inspection and Maintenance (As Required by Control Manufacturer)
1. Safety Relief Valve. Conduct try lever test as outlined in manufacturer’s instrucon tag on the safety
relief valve.
2. Low Water Cut-o (if used). Follow instrucons provided by control manufacturer.
G. General Inspection and Maintenance (Annual)
Annual inspecon and service is to be performed by a qualied service contractor as specied in the
Installaon, Operaon and Maintenance Manual supplied to the installer with the boiler. If a copy of
the original Installaon, Operaon and Maintenance Manual is not available a new copy is available at
PeerlessBoilers.com or from your local PB Heat, LLC Representave.
H. Error Handling
1. Lockout Errors
a. When a lockout error occurs, the display will show the lockout descripon.
b. Lockout codes require that the control be manually reset either by holding the center reset buon on
the display or by pressing the reset buon on the main control board itself.
c. Lockout errors should be invesgated further by a qualied service technician to determine the cause.
2. Blocking Errors
a. When a blocking error occurs, the display will show the error descripon.
b. Blocking errors will automacally clear if the condion is corrected.
c. These error messages and some suggested acons are listed in Table 10.2 of the IO&M.
3. Warning Errors
a. When a warning error occurs, the boiler display will show “Atte” followed by a number code.
b. Warning errors will automacally clear once the condion is corrected and will not prevent the boiler
from operang.
c. Warning 204 is for Outdoor Sensor not Connected. The PFC units will display this warning
on start-up if the provided outdoor sensor is not connected.
Do not operate the boiler with the condensate drain line disconnected. If there is evidence of
exhaust leakage from the condensate drain line, turn o󰀨 the unit and contact a qualied service
contractor. These conditions may result in boiler exhaust entering the structure and causing
severe personal injury or death from carbon monoxide poisoning and oxygen depletion.
⚠WARNING