Grace NP-P15, NP-P01, NP-PS, NP-PI, NP-PA-01 User Manual

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FREESTANDING PELLET STOVE

(PLEASE KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE)

A LIFETIME OF WARMTH

*Please read this entire manual before installation and use of
this pellet fuel burning room heater. Failure to follow these
instructions could result in property damage, bodily injury, or
even death.
*Save these instructions!

INSTALLER: THIS MANUAL MUST STAY WITH APPLIANCE!
MANUFACTURED BY:
NINGBO GRACE MACHINE CO., LTD
PO BOX 315400
Add. Lanshi Bridge Village, LanJiang Street, Yuyao ,Ningbo City,CHINA
Email: [e-mail]
Web: www.nbpelletstove.com
Tel. /Fax: [phone]

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Table of Contents

1. Fuel Requirement------------------------------------------------3

2. Stove Features -----------------------------------------------------7

3. Structure instruction----------------------------------------------10

4. Installation and Caution ------------------------------------------12

5. Operation ----------------------------------------------------------21

6. Maintenance--------------------------------------------------------34

7. Troubleshooting----------------------------------------------------38

8. Warranty------------------------------------------------------------42

9. Electronic Plan---------------------------------------------------- 43

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1. Fuel Requirement

Before introducing how the stove can be operated, the fuel of
stove should be briefly introduced since it is related to the
performance of the stove. (Your pellet stove has been designed to burn wood

pellets only. Do not use any other type of fuel, as this will void any warranties stated in

this manual.)

Pellet quality is important, please read the following:

The performance of your pellet stove is greatly affected by the type and quality of wood

pellets being burned. As the heat output of various quality wood pellets differs, so will

the performance and heat output of the pellet stove.

The Pellet Fuel Industries (P.F.I.) has established standards for wood pellet manufacturers.

We recommend the use of pellets that meet or exceed these standards. Please use a

recommended pellet type.

P.F.I. PELLET STANDARDS:

Fines (fine particles)......1% maximum through a 1/8‖ screen

Bulk Density..................40 pound per cubic foot minimum

Size..............................1⁄4‖ to 5/16‖ diameter 1⁄2 – 11⁄2‖ long maximum

Ash Content..................1% maximum (Premium grade)

..................3% maximum (Standard grade)

Moisture Content...........8% maximum

Heat Content.................approximately 8200 Btu per pound minimum

CAUTION:

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It is important to select and use only pellets that are dry and free of dirt or any impurities such

as high salt content. Dirty fuel will adversely affect the operation and performance of the unit

and will void the warranty.

ASH: The ash content of the fuel and operation of your stove will directly determine the

frequency of cleaning. The use of high ash fuels may result in the stove needing to be cleaned

daily. A low ash fuel may allow longer intervals between cleaning.

CLINKERING: [clinkers are silica (sand) or other impurities in the fuel that will form a hard

mass during the burning process]. This hard mass will block the air flow through the Burn Pot

Liner and affect the performance of the stove. Any fuel, even approved types, may tend to

clinker. Check the Burn-Pot Liner daily to ensure that the holes are not blocked with clinkers.

If they become blocked, remove the liner (when the unit is cold) and clean/scrape the clinkers

out. Clean the holes with a small pointed object if required.

Refer to the section Routine Cleaning and Maintenance.

PELLET FEED RATES: Due to different fuel densities and sizes, pellet feed rates may vary.

This may require an adjustment to combustion fan‘s speed or to the auger feed trim setting on

low. Since stove supplier has no control over the quality of pellets that you use, we assume no

liability for your choice in wood pellets.

Size of wood pellet

This stove uses wood pellet fuel. It is small column pellet with cleaning surface. Pellets are

either 1\4‖(6MM) or 5\16‖8(MM)in diameter and vary in length. The stove will burn either

diameter pellets. The length is no more than 30mm for￠6mm, 25mm for ￠8mm, and their

humidity is no more than 10%. Ash is no more than 1%. Take care of the pellet. Do not damp

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or crush it. Or, it will affect the efficiency and the dust will be collected on the door glass.

Pellet fuel is made from sawdust and scrap wood from many different species of wood. Pellets

made from hardwoods contain more ash than those made from softwoods. Minerals from ash and

sand in the pellets clinker under the extreme temperatures in the burn pot. Try burning various

brands of pellets until you find one that burns with minimum ash and clinkers. Once you find a

pellet brand that burns well, continue using this brand. High ash fuel increases the frequency of

stove cleaning. Fuel with excessive moisture content may jam the auger assembly.

Store pellets at least 36” (1m) away from the pellet stove

SAFETY WARNINGS AND RECOMMENDATIONS:

Caution: Do not connect to any air distribution duct or system. Do not burn garbage or

flammable fluids such as gasoline, naphtha or engine oil. When unit in operation, Keep

children, clothing and furniture away. Contact may cause skin burns.

FUEL: This pellet stove is designed and approved to only burn wood pellet fuel with up to

3% ash content. Dirty fuel will adversely affect the operation and performance of the unit and

may void the warranty. Check with your dealer for fuel recommendations.

THE USE OF CORDWOOD IS PROHIBITED BY LAW.

SOOT: Operation of the stove with insufficient combustion air will result in the formation of

soot which will collect on the glass, the heat exchanger, the exhaust vent system, and may

stain the outside of the house.

This is a dangerous situation and is inefficient. Frequently check your stove and remove the

dust inside of stove ensure proper combustion. If it is necessary, call your dealer to adjust the

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speed of fan or feeding speed.

CLEANING: There will be some of fly ash and small amounts of creosote built up in the

exhaust. This will vary due to the ash content of the fuel used and the operation of the stove.

It is advisable to inspect and clean the exhaust vent semi-annually or every two tons of

pellets.

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2. STOVE FEATURES

Pellet stove is advanced designed and has individual fresh air input and venting system.

Negative pressure burning technology causes high efficiency and little ash outlet during

burning. It will be shut off automatically by wrong burning or out of fuel. Large BTU, quick

heating and low fuel cost are its advantages.

1. Main performance

Model NP-P15

Dimension (WxHxD) MM 529x1025x512

Weight KG 115

Air inlet Pipe MM 40x80

Air outlet Pipe MM 76

Heat Area M2 120

Automatic Burning Time (Min-Max.) H 16/40

Fuel Wood Pellet

Consumption for Pellet (Min-Max) KG/H 0.8/2.0

Efficiency % 86%

Hopper Capacity KG 32

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60

Rating Power KW 11

Model NP-P01

Dimension (WxHxD) MM 510x1029x527

Weight KG 106

Air inlet Pipe MM 50

Air outlet Pipe MM 76/80

Heat Area M2 100

Automatic Burning Time (Min-Max.) H 20/40

Fuel Wood Pellet

Consumption for Pellet (Min-Max) 0.7/1.6

Efficiency % 85%

Hopper Capacity KG 30

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60

Rating Power KW 9

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Model NP-PS

Dimension (WxHxD) MM 439x900x487

Weight KG 80

Air inlet Pipe MM 50

Air outlet Pipe MM 80

Heat Area M2 60

Automatic Burning Time (Min-Max.) H 20/50

Fuel Wood Pellet

Consumption for Pellet (Min-Max) 0.4/0.9

Efficiency % 82%

Hopper Capacity KG 20

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60

Rating Power KW 5

Model NP-PI

Dimension (WxHxD) MM 471x993x470

Weight KG 110

Air inlet Pipe MM 50

Air outlet Pipe MM 80

Heat Area M2 90

Automatic Burning Time (Min-Max.) H 18/34

Fuel Wood Pellet

Consumption for Pellet (Min-Max) 0.7/1.4

Efficiency % 85%

Hopper Capacity KG 25

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60

Rating Power KW 8.0

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Model NP-PA

Dimension (WxHxD) MM 665x787x610

Weight KG 120

Air inlet Pipe MM 76

Air outlet Pipe MM 76

Heat Area M2 140

Automatic Burning Time (Min-Max.) H 13/33

Fuel Wood Pellet

Consumption for Pellet (Min-Max) 0.8/2.1

Efficiency % 83%

Hopper Capacity KG 27

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60

Rating Power KW 13

Model NP-PA-01

Dimension (WxHxD) MM 490x680x450

Weight KG 80

Air inlet Pipe MM 50

Air outlet Pipe MM 60

Heat Area M2 50

Automatic Burning Time (Min-Max.) H 15/24

Fuel Wood Pellet

Consumption for Pellet (Min-Max) KG/H 0.5/0.9

Efficiency % 80%

Hopper Capacity KG 12

Electronic consumption W/H 100-400

Rating Voltage and Frequency V/HZ 230/50-115/60-100/50

Rating Power KW 6

Thickness of steel, inside: MM 3

Thickness of steel, outside: MM 1.5-2

APPEARANCE CHOICES

The STOVE can be ordered with the following sides and doors color:

Black Red Beige

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3.Structure instruction

The stove is mainly made up of following items: (NB-P15 AS
EXAMPLE)

1. Hopper covers 2.hopper 3.auger 5.convertion blower 4. Auger motor 6.venting pipe 7. Exhaust

blower 8.front cover 9.ash drawer 10.fire shield board 11.stove door 12.heat exchanger 13.

Control board

The following is a list of main components and their functions

IGNITER

The STOVE comes equipped with an automatic igniter for lighting the fuel when the stove is in

lighting mode. There are two ways to light the wood pellet for our models. One is the igniter heats

wood pellet directly through the burn pot and then lighted by the combustion blower. The other

one is that the igniter lights the pellet directly. The igniter remains energized for the first eight

minutes of the lighting sequence.

VACCUM SWITCH

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The STOVE has s vacuum switch located behind the left door, fastened to the base. If a low

pressure is created in the firebox by a leak, opening the front door, a blocked flue, or unsealed ash

drawer, the vacuum switch will sense it and cause the stove to go into a shutdown mode.

AUGER AND AUGER MOTOR

The 5 RPM auger motor turns the auger, lifting pellets up the auger tube. The pellets are then

dropped down a tube and into the firepot. The auger is controlled by the control board.

OVER TEMPERATURE SNAP SWITCH

This switch is installed on the bottom of hopper and shut off the stove if it senses excessive

temperatures(70 degrees). This snap switch can be changed by resetting programs in the chip!

CONVECTION BLOWER SNAP SWITCH

This switch is installed on the vent pipe and turns the convection blower on when the stove gets up

to temperature (30 degrees). Besides, switch off the stove when the temperature goes below 30

degrees

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4. Pellet Stove installation

Deciding Where to Locate your Pellet Appliance and CLEARANCES TO COMBUSTIBLES:

When installing this unit on a combustible floor (for example linoleum, hardwood flooring) a

noncombustible hearth pad (15mm thickness) must be under the unit. The pad must extend at least

the width of the appliance [22‖ (558 mm)] and at least the depth of the appliance plus 6‖ (153 mm)

in front of the appliance [29 3⁄4‖ (756 mm)].

The clearance between the walls or to the top is no less than the
size of 50mm.

1. Electrical:

The unit must be grounded. The grounded electrical cord should be connected to a standard

230V, 50Hz (4.5 Amps), (115 volts (4.5 Amps), 60 hertz) electrical outlet. Be careful

that the electrical cord is not trapped under the appliance and that it is clear of any hot

surfaces or sharp edges and also must be accessible. If this power cord should become

damaged, a replacement power cord must be purchased from the manufacturer or a qualified

dealer.

2. Air input and venting pipe Installation

Several examples, taken by NB-P15, are the following

Horizontal and Up,

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Horizontal

Horizontal and Up through the eave